One friend capturing individual ape (11)
I believe the answer is:
impersonate
'ape' is the definition.
(I've seen this in another clue)
'one friend capturing individual' is the wordplay.
'one' becomes 'i' (Roman numeral).
'friend' becomes 'mate' (mate is a kind of friend).
'capturing' is an insertion indicator.
'individual' becomes 'person' (an individual person).
'mate' enclosing 'person' is 'mpersonate'.
'i'+'mpersonate'='IMPERSONATE'
(Other definitions for impersonate that I've seen before include "Take off" , "Assume character of another - no spare time (anag)" , "ape" , "Mimic" , "Assume the characteristics of another" .)