Thin man finally gets pointer? (6)
I believe the answer is:
narrow
'thin' is the definition.
(associated in meaning)
'man finally gets pointer?' is the wordplay.
'finally' suggests the final letters.
'gets' is a charade indicator (letters next to each other).
'pointer?' becomes 'arrow' (synonyms).
The last letter of 'man' is 'n'.
'n'+'arrow'='NARROW'
(Other definitions for narrow that I've seen before include "Short of breadth" , "Of limited width" , "Restricted - intolerant" , "Strait, not wide" , "contract" .)