He makes payment for various letters (7)
I believe the answer is:
settler
'he makes payment' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'various letters' is the wordplay.
'various' indicates anagramming the letters.
'letters' is an anagram of 'SETTLER'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for settler that I've seen before include "One taking up residence in a new area" , "Early mover into an area" , "Coloniser - arbitrator" , "New colonist" , "Person who moves into an uninhabited country" .)