Giant canned potato centre (5)

I believe the answer is:

titan

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'giant' is the definition.
(titans are giant mythological creatures)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for titan that I've seen before include "Giant -- rocket" , "Taint in a great man" , "Atlas, possibly" , "Mythological giant" , "Person of heroic stature" .)

I've seen this clue in the Evening Standard.

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