Kitchen motif too contrived, on reflection (4,2,5,2,2)
I believe the answer is:
come to think of it
'on reflection' is the definition.
(I've seen this before)
'kitchen motif too contrived' is the wordplay.
'contrived' indicates anagramming the letters.
'kitchen'+'motif'+'too'='kitchenmotiftoo'
'kitchenmotiftoo' with letters rearranged gives 'COME TO THINK OF IT'.
(Other definitions for come to think of it that I've seen before include "by the way" , "on reflection" .)