Free from restraint, made a sudden remark? (3,5)
I believe the answer is:
let loose
I believe this clue is a double definition.
'free from restraint' is the first definition.
(I've seen this before)
'made a sudden remark?' is the second definition.
(let loose can mean to speak without holding back)
(Other definitions for let loose that I've seen before include "Set free from restraint" , "Release, remove restraints" , "Set free, release" .)