He serves cooked rice (4)
I believe the answer is:
eric
'he' is the definition.
(I've seen this before)
'cooked rice' is the wordplay.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'rice' anagrammed gives 'ERIC'.
'serves' is the link.
(Other definitions for eric that I've seen before include "--, or Little by Little (Dean Farrar)" , "Blair, perhaps" , "- Sykes, British comedian" , "- Morecambe, comic" , "Boy's name" .)