Withdrawal of Noises Off after short period (9)
I believe the answer is:
secession
'withdrawal' is the definition.
(synonyms)
'noises off after short period' is the wordplay.
'off' indicates an anagram.
'after' says to put letters next to each other.
'short period' becomes 'sec' (I've seen this in another clue).
'noises' with letters rearranged gives 'ession'.
'ession' after 'sec' is 'SECESSION'.
'of' is the link.
(Other definitions for secession that I've seen before include "form of schism" , "The leaving of a federation" .)