Food that may be caught in cowboy's territory (6)
I believe the answer is:
oyster
'food' is the definition.
(oyster is a kind of food)
'caught in cowboy's territory' is the wordplay.
'caught in' indicates a hidden word.
'OYSTER' can be found hidden inside 'cowboys territory'.
'that may be' is the link.
(Other definitions for oyster that I've seen before include "Content of stew" , "the world may be yours" , "Native -- seafood" , "Source of pearl" , "Pearl-generating bivalve" .)