The great man got Gatting somewhat upset (5)

I believe the answer is:

titan

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'the great man' is the definition.
(I've seen this before)

I don't understand how the remainder of the clue works.

(Other definitions for titan that I've seen before include "Hyperion, for example" , "Taint in a mythical giant" , "Taint in a great man" , "Person of great strength - moon of Saturn" , "Saturn's largest satellite" .)

I've seen this clue in the Evening Standard.

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