Awaiting chains to restrain guards (2,5)
I believe the answer is:
in store
'awaiting' is the definition.
('in store' can mean awaiting or coming up)
'chains to restrain guards' is the wordplay.
'guards' indicates a hidden word.
'IN STORE' is hidden in the letters of 'chains to restrain'.
(Other definitions for in store that I've seen before include "Put by" , "Awaiting delivery" , "at the supermarket" , "Approaching" , "within retail site?" .)