Lie in bed ill; not fit enough to eat (8)
I believe the answer is:
inedible
'not fit enough to eat' is the definition.
I can't tell whether this defines the answer.
'lie in bed ill' is the wordplay.
'ill' indicates an anagram.
'lie'+'in'+'bed'='lieinbed'
'lieinbed' anagrammed gives 'INEDIBLE'.
Can you help me to learn more?
(Other definitions for inedible that I've seen before include "Awful to taste" , "Not suitable for consumption" , "not to be swallowed" , "Unpalatable" , "Not good as food" .)