Comparatively free, he does little work (7)
I believe the answer is:
slacker
'comparatively free he does little work' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'he does little work' is the wordplay.
I cannot quite see how this works, but
'he' could be 'ker' and 'ker' is present in the answer.
'little' could be 'l' (abbreviation for little) and 'l' is found within the answer.
The remaining letters 'sac' 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 slacker that I've seen before include "Someone who avoids the hard work" , "Not as tight" , "less tense" , "One evading responsibility" , "Person who shirks work or duty" .)