Lacking nourishment, you can still have fun, boy (5)
I believe the answer is:
unfed
'lacking nourishment you can still' is the definition.
I can't tell whether this defines the answer.
'fun boy' is the wordplay.
I cannot quite understand how this works, but
an anagram of 'fun' is 'unf' which is located in the answer.
'boy' could be 'ed' and 'ed' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'have' acts as a link.
Can you help me to learn more?
(Other definitions for unfed that I've seen before include "having nothing to get their teeth into?" , "Left hungry" , "Not having eaten or been provided with meal" , "may be hungry?" , "had not been given sustenance" .)