He shows former spouse greeting section with gold (9)
I believe the answer is:
exhibitor
'he' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'former spouse greeting section with gold' is the wordplay.
'former spouse' becomes 'ex' (an ex-spouse).
'greeting' becomes 'hi' (hi is a kind of greeting).
'section' becomes 'bit' (both can mean part).
'with' means one lot of letters go next to another.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'ex'+'hi'+'bit'+'or'='EXHIBITOR'
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for exhibitor that I've seen before include "Person displaying" , "One displaying (at show)" , "shower" , "showman" , "One showing items in gallery display" .)