Fit to return from Elba (4)
I believe the answer is:
able
'fit' is the definition.
(similar in meaning)
'return from elba' is the wordplay.
'elba' can be anagrammed to 'ABLE'.
However, I'm not sure how the anagram is indicated.
'to' is the link.
Can you help me to learn more?
(Other definitions for able that I've seen before include "- -bodied; - seaman" , "With the required capacities" , "Clever skilful" , "Competent as, say, sailor" , "displaying skill" .)