Panto dame's son and why his ways are deviant (5-5)
I believe the answer is:
wishy-washy
'panto dame's son' is the definition.
(son of Widow Twanky in the pantomime Aladdin)
'why his ways are deviant' is the wordplay.
'are deviant' indicates an anagram.
'why'+'his'+'ways'='whyhisways'
'whyhisways' with letters rearranged gives 'WISHY-WASHY'.
'and' acts as a link.
(Other definitions for wishy-washy that I've seen before include "Bland -- pale" , "Feeble, insipid" , "Diluted" , "Watered-down" , "Ineffectual" .)