Level out denture with gold (7)
I believe the answer is:
plateau
'level out' is the definition.
(I've seen this before)
'denture with gold' is the wordplay.
'denture' becomes 'plate' (I've seen this before).
'with' means one lot of letters go next to another.
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'plate'+'au'='PLATEAU'
(Other definitions for plateau that I've seen before include "Flat-topped height" , "High, level tract of land" , "Paul, eat! (anag)" , "Raised level area" , "Quiet time" .)