Look for food without a mould (5)
I believe the answer is:
forge
'mould' is the definition.
('forge' can be a synonym of 'mould')
'look for food without a' is the wordplay.
'look for food' becomes 'forage' (I've seen this before).
'without' is a deletion indicator.
'forage' with 'a' taken out is 'FORGE'.
(Other definitions for forge that I've seen before include "Smithy; falsify" , "Create; counterfeit" , "Smith's workshop" , "Blacksmith's workshop" , "Furnace for heating metal" .)