Pullover to protect classy keeper (5)
I believe the answer is:
guard
'keeper' is the definition.
(thesaurus)
'pullover to protect classy' is the wordplay.
I cannot quite understand how this works, but
'classy' could be 'u' (I've seen this in other clues) and 'u' is located in the answer.
The remaining letters 'gard' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
(Other definitions for guard that I've seen before include "Protect" , "Protect(or)" , "One keeps watch" , "Sentinel" , "See 1" .)