Incorporated is gold tooth (7)
I believe the answer is:
incisor
'tooth' is the definition.
(incisor is a kind of tooth)
'incorporated is gold' is the wordplay.
'incorporated' becomes 'inc'.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'inc'+'is'+'or'='INCISOR'
(Other definitions for incisor that I've seen before include "Front tooth" , "One takes a bite" , "Chisel-edged tooth" , "carnivore requires?" , "oral equipment" .)