Bribe reserve with gold nuggets, initially (6)
I believe the answer is:
suborn
'bribe' is the definition.
(thesaurus)
'reserve with gold nuggets initially' is the wordplay.
'reserve' becomes 'sub' (I've seen this in other clues).
'with' is a charade indicator (letters next to each other).
'gold' becomes 'or' ('or' is the heraldic name for gold).
'initially' indicates taking the first letters.
The first letter of 'nuggets' is 'n'.
'sub'+'or'+'n'='SUBORN'
(Other definitions for suborn that I've seen before include "Induce by bribery, say to commit perjury" , "Bribe to do wrong" , "Induce by bribery to fail in one's duty" , "Induce to commit unlawful act through bribary" , "Induce (someone) to break the law" .)