A hero, he went off to get mother a bouquet! (5)
I believe the answer is:
aroma
'a bouquet' is the definition.
(bouquet can mean a wine's aroma)
'a hero he went off to get mother' is the wordplay.
I cannot really see how this works, but
'a' is present in the answer.
'he' could be 'roma' and 'roma' is present in the answer.
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 aroma that I've seen before include "Strong smell" , "Savour" , "Pervasive quality" , "Food fragrance" , "Subtle quality" .)