Instruction book? (5)

I believe the answer is:

order

I believe this clue is a double definition.

'instruction' is the first definition.
(an order to do something)

'book?' is the second definition.
(order book is a kind of book)

(Other definitions for order that I've seen before include "Arrange < company" , "Arrangement; command" , "Command or request for goods" , "Kind - sort" , "Apply for - class" .)

I've seen this clue in The Globe and Mail.

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