Imagine extraordinary red feline returning (5,2)
I believe the answer is:
dream up
'imagine' is the definition.
(I've seen this before)
'extraordinary red feline returning' is the wordplay.
'extraordinary' indicates an anagram.
'feline' becomes 'puma' (puma is a kind of feline).
'returning' is a reversal indicator.
'puma' back-to-front is 'amup'.
'red' is an anagram of 'dre'.
'dre'+'amup'='DREAM UP'
(Other definitions for dream up that I've seen before include "'Devise or invent (5,2)'" , "Concoct" , "Invent (something)" , "Imagine, invent" , "Invent through imagination" .)