Kitchen range's popular once more (5)
I believe the answer is:
again
'once more' is the definition.
('again' can be a synonym of 'once more')
'kitchen range's popular' is the wordplay.
'kitchen range' becomes 'aga' (I've seen this before).
'popular' becomes 'in'.
'aga'+'in'='AGAIN'
(Other definitions for again that I've seen before include "'Another time, once more (5)'" , "Next time" , "second term" , "Here we go ___" , "On the other hand" .)