Warning to bring gold forward: there will be lots here (7)
I believe the answer is:
auction
'there will be lots here' is the definition.
'warning to bring gold forward' is the wordplay.
I cannot really see how this works, but
'gold' could be 'au' ('Au' can be a synonym of 'gold') and 'au' is found within the answer.
'forward' could be 'on' and 'on' is found within the answer.
This explanation may well be incorrect...
(Other definitions for auction that I've seen before include "Caution about method of sale" , "Public sale to the highest bidder" , "Public sale by bid" , "Public sale - type of bridge" , "Use caution at public sale" .)