Band tour in London area (6)
I believe the answer is:
stripe
'band' is the definition.
('stripe' can be a synonym of 'band')
'tour in london area' is the wordplay.
'tour' becomes 'trip' (I've seen this in other clues).
'in' means one lot of letters goes inside another.
'london area' becomes 'se' (abbreviation for South East).
'trip' going within 'se' is 'STRIPE'.
(Other definitions for stripe that I've seen before include "Broad band" , "Line of different colour - indicator of rank" , "Distinctive band" , "24 across (anag)" , "Military mark of rank, chevron" .)