Sample of smorgasbord served up with dip (3)
I believe the answer is:
sag
'dip' is the definition.
(thesaurus)
'sample of smorgasbord served up' is the wordplay.
'sample of' says the answer is hidden in the clue (I've seen this in other clues).
'served up' says the letters should be written in reverse.
'gas' can be found hidden inside 'smorgasbord'.
'gas' backwards is 'SAG'.
'with' is the link.
(Other definitions for sag that I've seen before include "Decline" , "Slump" , "Sink (under load)" , "Hang down loosely" , "Sink under weight" .)