Some clapping dual contrivance inside mine (7)
I believe the answer is:
plaudit
'some clapping' is the definition.
(thesaurus)
'dual contrivance inside mine' is the wordplay.
'contrivance' is an anagram indicator.
'inside' indicates putting letters inside.
'mine' becomes 'pit' (down the pit).
'dual' anagrammed gives 'laud'.
'laud' going inside 'pit' is 'PLAUDIT'.
(Other definitions for plaudit that I've seen before include "Praise, encomium" , "Salute" , "Cheer" , "Commendation, acclamation" , "Praise bestowed" .)