Kept from retiring (8)
I believe the answer is:
reserved
I believe this is a double definition.
'kept' is the first definition.
(reserving is a kind of keeping)
'retiring' is the second definition.
(thesaurus)
'from' is the link.
(Other definitions for reserved that I've seen before include "Aloof" , "Shy - set aside" , "Reticent; put by" , "Spoken for" , "Held back, set aside" .)