A Science Crossword - February 2025 ( Cryptic )

[Matakari]

Good evening, I’m stuck on the following. Help would be appreciated, thanks!

5a    Rachel left out copper compound for the writer (7) : ??A?C??
25a  Cut reported attempt to back group (7) : T?I????
16d  Course right around first European capital (8):?E?O?R??

[Captain2]

5 Chaucer - anagram of Rache(l) + Cu

[Toorak]

5 Chaucer - anagram of rache(l) & cu

[newmodarmy]

resource?

[newmodarmy]

anagram course +R+E

[newmodarmy]

trisect

[newmodarmy]

Sounds like TRY + SECT (not sure about the 'back' part of clue)

[Matakari]

Many thanks, all! The last one:
21 Surprisingly I abandon poetic place for Mickey Mouse science (5):
                                   E?C?T

[newmodarmy]

epcot= anagram poetic minus E

[Matakari]

Grateful, Newmodarmy!

[Neveracrossword]

Matakari, glad you've looked in - I wanted to say that I bet you were delighted to see La Jerezana in today's Spectator? You sailed through some of her previous puzzles!

[Matakari]

Thanks, NACW, but this time La Jerezana stumps me with a few...I think I'm a bit tired after my just ended jaunt in the Caribbean...