Fashionable movement prohibited, reportedly, with past close to forgotten (9)
I believe the answer is:
bandwagon
'fashionable movement' is the definition.
(I've seen this before)
'prohibited reportedly with past close to forgotten' is the wordplay.
I cannot really understand how this works, but
'with' could be 'and' and 'and' is found in the answer.
'past' could be 'ago' (similar in meaning) and 'ago' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bandwagon that I've seen before include "something fashionable all of a sudden" , "vehicle for musicians" , "Vehicle (jumped on when suddenly popular?)" , "Astaire/Buchanan film" , "See 24" .)