Turn in at the corner, love (3)
I believe the answer is:
nil
'love' is the definition.
(love and nil mean zero in cricket and football)
'turn in at the corner' is the wordplay.
'turn in' says the letters should be written backwards.
'at' becomes 'in' (synonymous in some cases - eg at school, in school).
'the corner' becomes 'l' (I can't explain this - if you can you should believe this answer much more).
'in' back-to-front is 'ni'.
'ni'+'l'='NIL'
Can you help me to learn more?
(Other definitions for nil that I've seen before include "Nothing, no score" , "0" , "none" , "Nothing, no value" , "Nothing - in Latin" .)