Hebe's upset when I have a source of sweetness (7)
I believe the answer is:
beehive
'source of sweetness' is the definition.
'beehive' can be an answer for 'source' (I have seen 'Source of honey ' mean 'beehive' so perhaps 'source' could also mean 'beehive'). I am not certain of the 'of sweetness' bit.
'hebe's upset when i have a' is the wordplay.
I cannot quite understand how this works, but
'i' is within the answer.
an anagram of 'hebe' is 'beeh' which is located in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for beehive that I've seen before include "Home for hymenopterous species" , "place buzzing with activity?" , "where workers gather" , "Enclosure where honey is first made" , "unusually high overheads?" .)