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' anagrams to 'ABLE'.
Though, I am unsure how the anagram is indicated.
'to' acts as a 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" .)