Hold releases, as discussed (6)
I believe the answer is:
freeze
'hold' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for freeze that I've seen before include "Hold at fixed level - say prices" , "Suddenly stop absolutely still" , "Harden into ice" , "Stand motionless" , "period of cold weather" .)