Bee fails to move - that's possible (8)
I believe the answer is:
feasible
'possible' is the definition.
(similar in meaning)
'bee fails to move' is the wordplay.
'to move' indicates anagramming the letters.
'bee'+'fails'='beefails'
'beefails' is an anagram of 'FEASIBLE'.
'that's' is the link.
(Other definitions for feasible that I've seen before include "Achievable" , "Able to be done, practical" , "Base life (anag.)" , "Easily possible to do" , "An idea" .)