Get (business, etc.) by soliciting (4,2)

I believe the answer is:

drum up

(Other definitions for drum up that I've seen before include "Obtain through vigorous effort - and percussion?" , "Try to get (something) by canvassing" , "Attempt to get support by canvassing" , "To attract" , "Attempt to obtain (support)" .)

I've seen this clue in The Times.

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