Stock ending for rude joke (5)
I believe the answer is:
equip
'stock ending' is the definition.
'equip' can be an answer for 'stock' (thesaurus). I'm unsure of the 'ending' bit.
'rude joke' is the wordplay.
'rude' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'joke' becomes 'quip' (a quip is a joke or witticism).
'e'+'quip'='EQUIP'
'for' is the link.
Can you help me to learn more?
(Other definitions for equip that I've seen before include "Provide with requirements" , "Give what's needed" , "Provide stuff" , "Accoutre" , "Furnish with requirements" .)