Pinching the feet (5)
I believe the answer is:
theft
'pinching' is the definition.
(thesaurus)
'the feet' is the wordplay.
'feet' becomes 'ft' (abbreviation).
'the'+'ft'='THEFT'
(Other definitions for theft that I've seen before include "1 across" , "Job" , "Action of stealing" , "Taking offence?" , "Dishonest appropriation" .)