Retired shooter to acquire a little wisdom? (6)
I believe the answer is:
nugget
'a little wisdom?' is the definition.
(I've seen this before)
'retired shooter to acquire' is the wordplay.
'retired' shows that the letters should be reversed in order.
'shooter' becomes 'gun' (I've seen this before).
'to acquire' becomes 'get' ('get' can be a synonym of 'acquire').
'gun' back-to-front is 'nug'.
'nug'+'get'='NUGGET'
(Other definitions for nugget that I've seen before include "Lump (of gold, etc)" , "Lump of gold ore" , "Lump of gold in natural state" , "valuable fragment" , "Piece of gold, information" .)