Baker ordered firm to supply meal (9)
I believe the answer is:
breakfast
'meal' is the definition.
(I know that breakfast is a type of meal)
'baker ordered firm' is the wordplay.
'ordered' is an anagram indicator.
'firm' becomes 'fast' (synonyms).
'baker' is an anagram of 'break'.
'break'+'fast'='BREAKFAST'
'to supply' acts as a link.
(Other definitions for breakfast that I've seen before include "One could be first on the table" , "croissants?" , "Early meal" , "First meal at Tiffany's" , "food" .)