For him, the right share's a long way out! (5)
I believe the answer is:
friar
'for him' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'right share's a long way out' is the wordplay.
'right share' becomes 'ri' (I can't explain this - if you can you should give a lot more credence to this answer).
'a long way' becomes 'far' (I've seen this before).
'out' indicates putting letters inside.
'ri' put inside 'far' is 'FRIAR'.
'the' is the link.
Can you help me to learn more?
(Other definitions for friar that I've seen before include "Monk perhaps" , "Mendicant priest" , "Religious man" , "Man connected with order" , "..... Tuck was one of Robin Hood's men" .)