Character to help with heavy heart (4)
I believe the answer is:
aida
'character' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
'help with heavy heart' is the wordplay.
'help' becomes 'aid' (synonyms).
'with' means one lot of letters go next to another.
'heart' indicates the central letters.
The middle letter of 'heavy' is 'a'.
'aid'+'a'='AIDA'
'to' is the link.
Can you help me to learn more?
(Other definitions for aida that I've seen before include "title role" , "Operatic lady" , "slave of Covent Garden" , "work of grand proportions" , "Princess" .)