Put out by discount store releasing doctrines (4)
I believe the answer is:
oust
'put' is the definition.
Although both the answer and definition are verbs in their base form, I don't see how one could define the other.
'out by discount store releasing doctrines' is the wordplay.
'out' indicates anagramming the letters.
'by' means one lot of letters go next to another.
'releasing' is a deletion indicator.
'discount' after 'store' is 'storediscount'.
'storediscount' with 'doctrines' removed is 'sout'.
'sout' with letters rearranged gives 'OUST'.
Can you help me to learn more?
(Other definitions for oust that I've seen before include "Overthrow" , "Remove from a position of power" , "responsible for expulsions" , "Remove and replace" , "Send packing" .)