I'd spend a bit of leisure going round capital (8)
I believe the answer is:
splendid
'capital' is the definition.
(thesaurus)
'i'd spend a bit of leisure going round' is the wordplay.
'a bit of' says to take the initial letters.
'going round' indicates anagramming the letters.
The initial letter of 'leisure' is 'l'.
'id'+'spend'+'l'='idspendl'
'idspendl' with letters rearranged gives 'SPLENDID'.
(Other definitions for splendid that I've seen before include "super" , "Grand" , "Excellent, magnificent" , "Very fine, glorious" , "'Excellent, glorious (8)'" .)