Body cut, third of league qualify (7)
I believe the answer is:
entitle
'qualify' is the definition.
(I've seen this before)
'body cut third of league' is the wordplay.
I cannot really understand how this works, but
'league' could be 'l' (abbreviation) and 'l' is found within the answer.
'cut third' could be 't' (3rd letter of 'cut') and 't' is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for entitle that I've seen before include "Give one the right - name" , "Allow" , "confer rank" , "Give a right or authority to" , "term" .)