Flattens out lots of bread at forum (7)
I believe the answer is:
unrolls
'out lots of bread at forum' is the definition.
I can't judge whether this definition defines the answer.
'flattens' is the wordplay.
I cannot really see how this works, but
'flattens' could be 'rolls' (rolling is a kind of flattening) and 'rolls' is located in the answer.
The remaining letters 'un' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for unrolls that I've seen before include "Reverses winding or twisting" , "Unfurls" , "comes from round the Pole" , "Opens out" .)