Side on pitch try, tired at end of game (4,4)
I believe the answer is:
goal line
'side on pitch' is the definition.
The definition and answer can be both locations as well as being singular nouns.
Perhaps you can see a link between them that I can't see?
'try tired at end of game' is the wordplay.
'try' becomes 'go' (go is a kind of try).
'tired' becomes 'allin' ('all in' can be similar in meaning to 'tired').
'at end of' says to take the final letters.
The final letter of 'game' is 'e'.
'go'+'allin'+'e'='GOAL-LINE'
Can you help me to learn more?
(Other definitions for goal line that I've seen before include "A lion leg (anag.)" , "Mark behind the keeper" , "End of a football pitch" .)