Nobody can look forward to it for long (8)
I believe the answer is:
tomorrow
'long' is the definition.
Both the definition and answer are adverbs. Perhaps you can see an association between them that I can't see?
'nobody can look forward to it' is the wordplay.
I cannot quite see how this works, but
'to' is present in the answer.
The remaining letters 'morrow' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'for' is the link.
Can you help me to learn more?
(Other definitions for tomorrow that I've seen before include "... and ...and ... / Creeps in this petty pace from day to day (Macbeth)" , "It's another day" , "when weekend begins?" , "In 24-hours time" , "The next day" .)