Heavens! Food price to go up? (7)
I believe the answer is:
airfare
'price to go up?' is the definition.
I don't know anything about this answer so I cannot tell whether this works.
'heavens food' is the wordplay.
'heavens' becomes 'air' (I am not sure about this - if you are sure you should believe this answer much more).
'food' becomes 'fare' (fare is a kind of food).
'air'+'fare'='AIRFARE'
Can you help me to learn more?
(Other definitions for airfare that I've seen before include "Charge for flight" , "Fee for a flight" , "Cost of flying" , "flight damage" , "The cost of travelling" .)