Live in Clapham, perhaps - a major resort and tourist centre (4,5)
I believe the answer is:
palm beach
'a major resort and tourist centre' is the definition.
'live in clapham perhaps' is the wordplay.
'live' becomes 'be' ('be' can be a synonym of 'live').
'in' means one lot of letters goes inside another.
'perhaps' indicates an anagram.
'clapham' anagrammed gives 'palmach'.
'be' inserted into 'palmach' is 'PALM BEACH'.
(Other definitions for palm beach that I've seen before include "Florida resort" , "US resort" , "Florida tourist centre" .)