Awkward to start gambling with gold. Revolutionary! (6)
I believe the answer is:
gauche
'awkward' is the definition.
(I've seen this before)
'start gambling with gold revolutionary' is the wordplay.
'start' says to take the initial letters.
'with' is a charade indicator (letters next to each other).
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
The initial letter of 'gambling' is 'g'.
'g'+'au'+'che'='GAUCHE'
'to' acts as a link.
(Other definitions for gauche that I've seen before include "left for Paris" , "Cantona's left" , "Clumsy and inept" , "Awkward in manner, tactless" , "Clumsily tactless" .)