Player doing a stretch by the book (6,5)
I believe the answer is:
inside right
'player doing a stretch' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'by the book' is the wordplay.
I cannot really see how this works, but
'by' could be 'side' ('side' can be a synonym of 'by') and 'side' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for inside right that I've seen before include "Former footballer" , "Forward" .)