Butcher's no good for pop (5)
I believe the answer is:
lance
'for pop' is the definition.
(as in popping or lancing a boil)
'butcher's no good' is the wordplay.
'butcher's' becomes 'glance' (butcher's hook is Cockney rhyming slang for look).
'no' indicates named letters should be taken away.
'good' becomes 'g' (abbreviation).
'glance' with 'g' taken away is 'LANCE'.
(Other definitions for lance that I've seen before include "Jousting weapon" , "Long weapon; prick" , "Cut open" , "A horse soldier's spear" , "Horseman's long spear" .)