Enthusiasm for glum sitcom that's shown regularly (5)
I believe the answer is:
gusto
'enthusiasm' is the definition.
(I know that gusto is a type of enthusiasm)
'for glum sitcom that's shown regularly' is the wordplay.
I cannot quite see how this works, but
'for' could be 'to' (eg both can mean 'in the opinion of') and 'to' is found in the answer.
The remaining letters 'gus' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for gusto that I've seen before include "Energy" , "Verve, zest" , "Spirit" , "Got us with great enjoyment" , "Zest and enjoyment in doing something" .)