Daniel S

@Stiv Yes, it is

C4 hint: Class in the taxonomic sense

C4 hint: sign of puberty for about half of my class

CCCC: Virgin Mother’s first sign of puberty. (7)

I have one that I can run with…

… hash checks with space

Not sure that my Spanish is up to this, but is this ELL IO T(-_E) PAGE?

Correct (see pup wiktionary definition 6 ( I used to do lighting for plays))

CCCC: Spotlight stroke for one with controlled movements. (6)

... hash checks out

_ISOME TRIC_

@juicifer That’s it Alba-Kirk-y like a Scottish church

CCCC: Sounds like a Scottish church is a bad place to take a wrong turn. (11)

@Jafe DO(_D)GE

FEM PER SON could be FPS which is also episode 55 of [Law and Order: Criminal Intent](en.wikipedia.org/wiki/F.P.S._(Law_%26_Order:_Criminal_Intent) and hence a transmission or trans wiktionary etymology 3... I doubt this is correct, but it keeps the ball rolling.

@TakingNotes That’s the one

s/does/has/

C4 hint: I am inferring a term for "lady-killer", which does not appear in dictionaries, but does some usage (at least according to Google).

CCCC: Sauce, as is leaking from lady-killer. (9)

@oAlt That is to say C_ O_ DOM< A IN

Thanks gang

@juicifer Indeed it it

CCCC: Peaceful union - union of Northern Territories, Malta, Lithuania, Eastern Congo, and Sweden. (12)

@msh210 D_ A_ _L _E _K

Good one!

BOW LEG might be caused by arthritis

peg can be to make contact; leg can be a runner; a PEG LEG would be extreme treatment for arthritis...

@msh210 There is a river Ray in Wiltshire... is this A+ R(R)AY?

@Sphinx Oh brother... put all my effort into the poetic form and I forgot how *fixes work.

@Ankoganit Yes indeed

CCCC: Six deliveries (six with 504 returned) that's lurid! (9)

@msh210 AN ION (&lit?)

Wooo! SCIENCE!

@Jafe I find it hilarious that the Scandinavian Airline System can be confused with the Special Air Service

@Ankoganit That’s the one

C4 hint: Think not just laterally, but orthogonally

If you prefer 四国 only consists of 2 kana

The MacNee-Rigg years were the best.

@msh210 I always felt that a "Man from UNCLE" and "Avengers" cross-over was a missed opportunity.

@msh210 Hence "Mother is mothering" aiui

CCCC: On reflection, British mother is a dog. (6)

Lovely anagramming

@juicifer SERENDIPITOUS*

@juicifer It truly is (noting that ⊕ is &CirclePlus; in html)

CCCC: Copy circle plus former partner's retreat. (5)

The sibling reference is new to me, but agree on the hash.

Fidgety ~ restless; does wrestles = w. + restles(-s) have a sibling connection?

Makes like siblings = rivals?

APOMIXIS makes identical siblings as does PARTHENOGENESIS (which ends in SIS)...

@verbose Na bra... ze bra is one wink out of forty, bra