Hungry in space-age restaurant (5)
I believe the answer is:
eager
'hungry' is the definition.
(I've seen this before)
'in space-age restaurant' is the wordplay.
'in' indicates the answer is hidden within the clue.
'EAGER' is hidden in the letters of 'space age restaurant'.
(Other definitions for eager that I've seen before include "hungry" , "passionate" , "Earnest" , "Desperate" , "Low platform" .)