Flamboyant men turning over palm (6)
I believe the answer is:
rococo
'flamboyant' is the definition.
(thesaurus)
'men turning over palm' is the wordplay.
'men' becomes 'or' (I've seen this in other clues).
'turning over' shows that the letters should be reversed in order.
'palm' becomes 'coco' (coco is a kind of palm).
'or' back-to-front is 'ro'.
'ro'+'coco'='ROCOCO'
(Other definitions for rococo that I've seen before include "Fancifully ornamented" , "More elaborate form of baroque" , "Delicate architectural style from 18th-century France" , "Late Baroque artistic style" , "Ornamental style associated with Louis XV" .)