Crossword Genius

Old coach’s assiduity (9)

Ross

I believe the answer is:

diligence

I believe this clue is a double definition.

'old coach's' is the first definition.
(historical type of stagecoach)

'assiduity' is the second definition.
(thesaurus)

(Other definitions for diligence that I've seen before include "Old stagecoach" , "dedication" , "Industriousness" , "Thoroughgoing application" , "Painstaking care" .)

I've seen this clue in The Times.
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