Ambled around madhouse (6)
I believe the answer is:
bedlam
'madhouse' is the definition.
('Bedlam' can be a synonym of 'madhouse')
'ambled around' is the wordplay.
'around' indicates an anagram.
'ambled' is an anagram of 'BEDLAM'.
(Other definitions for bedlam that I've seen before include "Blamed for confused uproar" , "Noisy confused state" , "Madhouse - uproar" , "Ambled (anag)" , "State of extreme confusion and uproar" .)