At the end of the day, animal being brought to church earlier might prove unforgettable (6)
I believe the answer is:
catchy
'prove unforgettable' is the definition.
I can't judge whether this defines the answer.
'at the end of the day animal being brought to church earlier' is the wordplay.
'at the end of' indicates one should take the final letters.
'animal' becomes 'cat' (cats are animals).
'being brought to' means one lot of letters go next to another.
'church' becomes 'ch' (common abbreviation).
'earlier' means one lot of letters go next to another.
The last letter of 'day' is 'y'.
'cat'+'ch' is 'catch'.
'y' put after 'catch' is 'CATCHY'.
'might' is the link.
Can you help me to learn more?
(Other definitions for catchy that I've seen before include "(Of a tune) likely to remain in one's head" , "Readily caught, like a tune" , "Of tune, pleasant and easy to remember (6)" , "Staying in the mind of a tune" , "Hummable" .)