Silly person, proceed? (4)
I believe the answer is:
goon
'silly person' is the definition.
(I've seen this before)
'proceed?' is the wordplay.
I cannot really see how this works, but
'proceed?' could be 'go' (synonyms) and 'go' is located in the answer.
The remaining letters 'on' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for goon that I've seen before include "Hired thug" , "Stupid person" , "person making fool of himself" , "someone rather stupid" , "Foolish person - thug (US)" .)