Drive out of capital of Turkey, chasing a great deal for the tourist (9)

I believe the answer is:

sightseer

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'tourist' is the definition.
(sightseer is a kind of tourist)

I cannot understand how the rest of the clue works.

(Other definitions for sightseer that I've seen before include "Visitor to famous locations" , "Tourist visiting scenes of interest" , "Rubberneck" , "Tripper" .)

I've seen this clue in The Times.

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