Sally rips toe badly (7)
I believe the answer is:
riposte
'sally' is the definition.
(both can mean a witty remark)
'rips toe badly' is the wordplay.
'badly' indicates anagramming the letters (letters in the wrong order).
'rips'+'toe'='ripstoe'
'ripstoe' anagrammed gives 'RIPOSTE'.
(Other definitions for riposte that I've seen before include "Return thrust or repartee" , "Quick answer" , "Witty retort" , "Reply, retort" , "Quick clever reply" .)