Put off being freed indefinitely (5)
I believe the answer is:
defer
'put off' is the definition.
(I know that put off can be written as defer)
'freed indefinitely' is the wordplay.
'indefinitely' is an anagram indicator (indefinitely can mean vaguely or uncertainly).
'freed' anagrammed gives 'DEFER'.
'being' is the link.
(Other definitions for defer that I've seen before include "put on ice" , "Yield to another's wishes" , "Give precedence to" , "Freed (anag.)" , "Hold over, put off" .)