Didn't say anything: only got in trim physically (8,2)
I believe the answer is:
buttoned up
'trim physically' is the definition.
Both the answer and definition are adjectives. Perhaps there's a link between them I don't understand?
'didn't say anything only got' is the wordplay.
I cannot quite see how this works, but
'only' could be 'one' (synonyms) and 'one' is present in the answer.
This explanation may well be incorrect...
'in' acts as a link.
Can you help me to learn more?
(Other definitions for buttoned up that I've seen before include "concluded satisfactorily" , "Silent" , "Successfully concluded business" , "Tight-lipped" , "presumably lacking zip!" .)