Garfield's forty winks? (6)
I believe the answer is:
catnap
'forty winks?' is the definition.
(synonyms)
'garfield's' is the wordplay.
I cannot really see how this works, but
'garfield' could be 'cat' (I've seen this in another clue) and 'cat' is found in the answer.
The remaining letters 'nap' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for catnap that I've seen before include "little snooze" , "For a rest" , "(Tom's) snooze?" , "Short sleep" , "Brief doze" .)