Cheese and English crackers served up (4)
I believe the answer is:
edam
'cheese' is the definition.
(I've seen this before)
'english crackers served up' is the wordplay.
'english' becomes 'e' (abbreviation).
'crackers' becomes 'mad' (I've seen this before).
'served up' says the letters should be written backwards.
'mad' reversed gives 'dam'.
'e'+'dam'='EDAM'
'and' is the link.
(Other definitions for edam that I've seen before include "Kind of cheese" , "Made into popular cheese" , "Cheese made in Holland" , "Sphere of Dutch cheese" , "Danish cheese" .)