Place of noisy entertainment, such as Piccadilly? (6)
I believe the answer is:
circus
I believe this is a double definition.
'place of noisy entertainment' is the first definition.
'such as piccadilly?' is the second definition.
(Piccadilly Circus is a London road junction)
(Other definitions for circus that I've seen before include "Eg, Piccadilly, Oxford" , "Performance of 1d [ADVENTURE]" , "lively scene" , "Performance by acrobats, clowns and animals" , "Travelling tent show" .)