Various bananas sir mislaid (10)
I believe the answer is:
dissimilar
'various' is the definition.
(thesaurus)
'bananas sir mislaid' is the wordplay.
'bananas' indicates an anagram (informal term for mad).
'sir'+'mislaid'='sirmislaid'
'sirmislaid' with letters rearranged gives 'DISSIMILAR'.
(Other definitions for dissimilar that I've seen before include "Unlike" , "Unalike" , "Not like" .)