Superb spreadsheet provided for limited time? (9)
I believe the answer is:
excellent
'superb' is the definition.
(thesaurus)
'spreadsheet provided for limited time?' is the wordplay.
'spreadsheet' becomes 'Excel' (Microsoft Excel is spreadsheet software).
'provided for limited time?' becomes 'lent' (to lend is to give something for a limited time).
'excel'+'lent'='EXCELLENT'
(Other definitions for excellent that I've seen before include "Outstanding, very good" , "brilliant" , "A-One" , "Fine" , "Superior, of the highest quality" .)