Crossword Genius

Book shows self-restraint (7)

Ross

I believe the answer is:

reserve

This clue is a double definition.

'book' is the first definition.
(as in booking or reserving in advance)

'self-restraint' is the second definition.
(thesaurus)

'shows' is the link.

(Other definitions for reserve that I've seen before include "man on bench?" , "One on bench" , "Lack of openness" , "Bank" , "some distance" .)

I've seen this clue in The Daily Express and The Mirror.
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