Capital I invested in a report, wasted (8)
I believe the answer is:
pretoria
'capital' is the definition.
(Pretoria is an example)
'i invested in a report wasted' is the wordplay.
'invested in' indicates putting letters inside.
'wasted' indicates anagramming the letters.
'a'+'report'='areport'
'areport' is an anagram of 'pretora'.
'i' placed into 'pretora' is 'PRETORIA'.
(Other definitions for pretoria that I've seen before include "Pirate or, oddly, a South African city" , "City in South Africa" , "Administrative capital of South Africa" , "Capital city" , "Pirate or a South African city, strangely" .)