Silly person in clip (5)
I believe the answer is:
prune
I believe this clue is a double definition.
'silly person' is the first definition.
'clip' is the second definition.
(I know that clip can be written as prune)
'in' acts as a link.
(Other definitions for prune that I've seen before include "Trim - dried fruit" , "Trim (tree); dried plum" , "A fruit; to cut back" , "Cut back the dried plum" , "Shrivelled fruit" .)