Sent up light ode on bananas (9)
I believe the answer is:
lampooned
'sent up' is the definition.
(I've seen this in another clue)
'light ode on bananas' is the wordplay.
'light' becomes 'lamp' (lamp is a kind of light).
'bananas' indicates anagramming the letters (informal term for mad).
'ode'+'on'='odeon'
'odeon' is an anagram of 'ooned'.
'lamp'+'ooned'='LAMPOONED'
(Other definitions for lampooned that I've seen before include "Satirised" , "made to look silly" , "Publicly ridiculed" .)