Go on pinching a single sausage (9)
I believe the answer is:
pepperoni
'sausage' is the definition.
(I know that pepperoni is a type of sausage)
'go on pinching a single' is the wordplay.
'go' becomes 'pep' (I've seen this before).
'pinching' is an insertion indicator (taking inside).
'a' becomes 'per' (eg 'one a day' means 'one per day').
'single' becomes 'I' (one).
'pep'+'on'='pepon'
'pepon' going around 'per' is 'pepperon'.
'pepperon'+'i'='PEPPERONI'
(Other definitions for pepperoni that I've seen before include "Hard, spicy beef and pork sausage" , "something spicy" , "Spicy snacks" , "Spicy Italian sausage" , "spicy food" .)