Putin protects American leader and most of 13 across with information technology getting a restraining order (3,1,4,2,2)
I believe the answer is:
put a sock in it
'putin protects american leader' is the definition.
I know nothing about this answer so I can't tell whether this works.
'and most of 13 across with information technology getting a restraining order 31422' is the wordplay.
I cannot quite see how this works, but
'and' could be 'n' (common abbreviation for 'and') and 'n' is present in the answer.
'of' could be 'o' and 'o' is present in the answer.
'technology' could be 'it' and 'it' is located in the answer.
'a' is found in the answer.
'order' could be 'put' ('put' can be a synonym of 'order') and 'put' is found in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for put a sock in it that I've seen before include "Shut up! Stuff with footwear?" , "If your shoe is too big, you" , "Stop endless yacking" , "Keep mum" , "Stop talking (3,1,4,2,2)" .)