Too much of a good thing? (4)
I believe the answer is:
orgy
'too much' is the definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'a good thing?' is the wordplay.
I cannot quite see how this works, but
'good' could be 'g' (abbreviation) and 'g' is present in the answer.
The remaining letters 'ory' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'of' acts as a link.
Can you help me to learn more?
(Other definitions for orgy that I've seen before include "Wild revel" , "Excess" , "Excessive indulgence" , "Wild overindulgent party" , "A licentious immoral party" .)