Given strict instructions to be tidy (7)
I believe the answer is:
ordered
I believe this is a double definition.
'given strict instructions' is the first definition.
(orders are instructions)
'be tidy' is the second definition.
(in order or organised)
'to' acts as a link.
(Other definitions for ordered that I've seen before include "Told" , "Gave instruction, commanded" , "Requisitioned" , "Settled, tidy" , "Regulated" .)