Senior citizen squaddie perhaps shaved? (5)
I believe the answer is:
oldie
'senior citizen' is the definition.
(I've seen this before)
'squaddie perhaps shaved?' is the wordplay.
'squaddie perhaps' becomes 'soldier' (squadron is a type of soldier).
'shaved?' indicates the central letters.
The middle of 'soldier' is 'OLDIE'.
(Other definitions for oldie that I've seen before include "Elderly person" , "Mature person; magazine" , "Venerable person/thing" , "Veteran" , "Standard song" .)