Are guards called to order? (7)
I believe the answer is:
arrange
'order?' is the definition.
(ordering is a kind of arranging)
'are guards called' is the wordplay.
'guards' is an insertion indicator.
'called' becomes 'rang' ('ring' can be a synonym of 'call').
'are' going around 'rang' is 'ARRANGE'.
'to' is the link.
(Other definitions for arrange that I've seen before include "Put in sequence" , "Order, plan or design" , "Put in order; make plans" , "position" , "Set in order" .)