Leave a league after lower score at rugby (4,4)
I believe the answer is:
drop goal
'score at rugby' is the definition.
'drop goal' can be an answer for 'score' (I've seen this before). I'm not certain of the 'at rugby' bit.
'leave a league after lower' is the wordplay.
I cannot quite see how this works, but
'leave' could be 'go' (to go is to depart or leave) and 'go' is located in the answer.
'a' is present in the answer.
'league' could be 'l' (abbreviation) and 'l' is located in the answer.
'lower' could be 'drop' (I've seen this before) and 'drop' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for drop goal that I've seen before include "one scores with over the bar" , "score points?" , "One way of scoring at rugby" .)