Some fugitive, as yet loose (4)
I believe the answer is:
easy
'loose' is the definition.
(thesaurus)
'some fugitive as yet' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'EASY' is hidden within 'fugitive as yet'.
(Other definitions for easy that I've seen before include "Presenting no problems" , "... Rider (film)" , "Tranquil" , "Relaxed" , "Effortless, uncomplicated" .)