Fine fight in part of pitch (7,3)
I believe the answer is:
penalty box
'part of pitch' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'fine fight' is the wordplay.
'fine' becomes 'penalty' (I've seen this in another clue).
'fight' becomes 'box' (boxing is a kind of fighting).
'penalty'+'box'='PENALTY BOX'
'in' is the link.
Can you help me to learn more?
(Other definitions for penalty box that I've seen before include "Spot container" , "area spotted?" .)