Less sensible place to go: area in Wigan booked (7)
I believe the answer is:
loopier
'less sensible' is the definition.
'place to go area in wigan booked' is the wordplay.
'place to go' becomes 'loo' ('go' can mean 'urinate').
'area in wigan booked' becomes 'pier' (reference to the book The Road to Wigan Pier).
'loo'+'pier'='LOOPIER'
(Other definitions for loopier that I've seen before include "less stable" , "more unbalanced" , "Dafter" , "More crazy" .)