Hint: broth and porridge server (7)
I believe the answer is:
soupcon
'hint' is the definition.
(I know that hint can be written as soupcon)
'broth and porridge server' is the wordplay.
'broth' becomes 'soup' (I've seen this before).
'and' says to put letters next to each other.
'porridge server' becomes 'con' (I am not sure about this - if you are sure you should believe this answer much more).
'soup'+'con'='SOUPCON'
Can you help me to learn more?
(Other definitions for soupcon that I've seen before include "Tiny quantity" , "Hint" , "very little" , "Smidgen" , "A very small quantity, from French" .)