One may wish them to be sweet (6)
I believe the answer is:
dreams
'one may wish them to be sweet' is the definition.
I can't tell whether this definition defines the answer.
'one may wish them' is the wordplay.
I cannot really understand how this works, but
'one' could be 'a' and 'a' is found in the answer.
'them' could be 'em' and 'em' is located in the leftover letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for dreams that I've seen before include "Imaginings" , "Thoughts and visions during sleep" , "Reveries or cherished aspirations" , "Fantasy ambitions" , "'''We are such stuff as ... are made on'' The Tempest (6)'" .)