Crossword Genius

Tiger Woods is one to sack large caddy, perhaps (5)

Ross

I believe the answer is:

gofer

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'tiger' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?

I cannot understand how the remainder of the clue works.

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(Other definitions for gofer that I've seen before include "Menial assistant" , "Assistant who runs errands (slang)" , "Informal word for one who runs errands" , "caddie?" , "Slang, an employee who runs errands" .)

I've seen this clue in The Independent.
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