He dispenses riches, hiding a sad heart (7)
I believe the answer is:
cashier
'he dispenses' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'riches hiding a sad heart' is the wordplay.
I cannot quite see how this works, but
'a' is present in the answer.
an anagram of 'riches' is 'cshier' which is present in the remaining letters.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for cashier that I've seen before include "Sack" , "Dismiss; receiver and payer of money" , "person taking the money" , "Remove from service" , "I search (anag) - dismiss from armed forces with disgrace" .)