Flattering fellow left for shelter (6)
I believe the answer is:
awning
'shelter' is the definition.
(awning is a kind of shelter)
'flattering fellow left' is the wordplay.
'flattering' becomes 'fawning' (fawning is a kind of flattering).
'fellow' becomes 'f' (abbreviation - of a society etc.).
'left' suggests deleting specific letters.
'fawning' with 'f' removed is 'AWNING'.
'for' acts as a link.
(Other definitions for awning that I've seen before include "Canvas covering over, say, a patio" , "Shade over shop window" , "Canopy for shelter from rain or sun" , "Roof of canvas stretched on frame as shelter" , "Canvas sunshield" .)