Crossword Genius

A bookie and a course (5)

Ross

I believe the answer is:

layer

I believe this clue is a double definition.

'a bookie' is the first definition.
(I've seen this in another clue)

'a course' is the second definition.
(I've seen this before)

'and' acts as a link.

(Other definitions for layer that I've seen before include "Stratum; eg, hen" , "Stratum; chicken" , "course" , "Thin sheet - productive hen" , "(Separate) level" .)

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