Pole gets allowed outside some time before Easter (4)
I believe the answer is:
lent
'some time before easter' is the definition.
(Lent is the fast leading up to Easter)
'pole gets allowed outside' is the wordplay.
'pole' becomes 'n' (abbreviation for North, as in North Pole).
'gets' indicates putting letters inside.
'allowed outside' becomes 'let' (to let is to allow or permit. I am not sure about the 'outside' bit.).
'n' put inside 'let' is 'LENT'.
Can you help me to learn more?
(Other definitions for lent that I've seen before include "Forty days of fasting" , "days before Easter" , "Period from Ash Wednesday to Easter" , "Loaned; a fast" , "Advanced" .)