Fashion finally becomes cross (7)
I believe the answer is:
enraged
'cross' is the definition.
Both the answer and definition are adjectives. Perhaps there's an association between them I don't understand?
'fashion finally' is the wordplay.
I cannot quite understand how this works, but
'fashion' could be 'rage' (rage is a kind of fashion) and 'rage' is found within the answer.
The remaining letters 'end' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'becomes' acts as a link.
Can you help me to learn more?
(Other definitions for enraged that I've seen before include "Incensed" , "Greatly angered" , "Infuriated, made mad" , "Angered (anag) - extremely so!" , "Made very angry" .)