Strange cult with alien food (6)
I believe the answer is:
cutlet
'food' is the definition.
(cutlet is a kind of food)
'strange cult with alien' is the wordplay.
'strange' indicates an anagram.
'with' means one lot of letters go next to another.
'alien' becomes 'et' (extraterrestrial).
'cult' is an anagram of 'cutl'.
'cutl'+'et'='CUTLET'
(Other definitions for cutlet that I've seen before include "Thin piece of rib-meat" , "Flat croquette of meat in breadcrumbs" , "Piece of rib with its meat" , "Thin slice of meat" , "(Meat) chop" .)