Reclusive sort (5)
I believe the answer is:
loner
'reclusive sort' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for loner that I've seen before include "Unsociable person" , "One preferring to act individually" , "Solitary individual, prefers own company" , "Enrol (anag)" , "Isolated person" .)