Stick short rat tails on pig (7)
I believe the answer is:
glutton
'pig' is the definition.
(I've seen this before)
'stick short rat tails on' is the wordplay.
'stick short' becomes 'glut' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'tails' suggests the final letters (I've seen 'tailed' mean this).
The final letter of 'rat' is 't'.
'glut'+'t'+'on'='GLUTTON'
Can you help me to learn more?
(Other definitions for glutton that I've seen before include "One could visit several restaurants!" , "Pig" , "Gourmand" , "One who eats to excess" , "Greedy person" .)