Run back inside tent for food (6)
I believe the answer is:
yogurt
'food' is the definition.
(yogurt is a kind of food)
'run back inside tent' is the wordplay.
'run' becomes 'go' ('go' can be a synonym of 'run'**).
'back' shows that the letters should be reversed in order.
'inside' is an insertion indicator.
'tent' becomes 'yurt' (I've seen this before).
'go' back-to-front is 'og'.
'og' put inside 'yurt' is 'YOGURT'.
'for' is the link.
(Other definitions for yogurt that I've seen before include "Food prepared from thickened milk" , "Milk-food" , "Semi-liquid dairy product" , "healthy breakfast" , "Dairy product made from curdled milk" .)