Solitary individual in outskirts of Leicester (5)
I believe the answer is:
loner
'solitary' is the definition.
(I've seen this in another clue)
'individual in outskirts of leicester' is the wordplay.
'individual' becomes 'one' (an individual is one person).
'in' means one lot of letters goes inside another.
'outskirts of' suggests removing the centre (only letters on the outskirts).
'leicester' with its centre removed is 'lr'.
'one' placed into 'lr' is 'LONER'.
(Other definitions for loner that I've seen before include "One liking solitude" , "Solitary individual, prefers own company" , "Antisocial person" , "One not desiring companionship" , "Isolated individual" .)