One who gets runs after treatment by professional (8)
I believe the answer is:
procurer
'one who' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'runs after treatment by professional' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'after' is a charade indicator (letters next to each other).
'treatment' becomes 'cure' (medical treatment).
'by' says to put letters next to each other.
'professional' becomes 'pro' (abbreviation).
'cure' after 'pro' is 'procure'.
'r' put after 'procure' is 'PROCURER'.
'gets' is the link.
Can you help me to learn more?
(Other definitions for procurer that I've seen before include "Solicitor" , "One who obtains something" , "One securing" , "One getting" , "One who picks up" .)