Figure to get one for half a dollar (4)
I believe the answer is:
idol
'figure' is the definition.
(I've seen this before)
'one for half a dollar' is the wordplay.
'one' becomes 'i' (Roman numeral).
'for' is a charade indicator (letters next to each other).
'half a' indicates taking half.
'dollar' halved is 'dol'.
'i'+'dol'='IDOL'
'to get' is the link.
(Other definitions for idol that I've seen before include "Figure of worship" , "Who's greatly respected" , "Darling" , "Billy" , "One much admired" .)