101 tons carried in true performance (7)
I believe the answer is:
recital
'performance' is the definition.
(I know that recital is a type of performance)
'101 tons carried in true' is the wordplay.
'101' becomes 'CI' (roman numerals).
'tons' becomes 't'.
'carried in' is an insertion indicator.
'true' becomes 'real' (similar in meaning).
'ci'+'t'='cit'
'cit' inserted inside 'real' is 'RECITAL'.
(Other definitions for recital that I've seen before include "Performance of music by soloist" , "Public performance by a solo musician" , "Enumeration of facts" , "Performance, usually musical" , "statement of facts" .)