Tees off munching sweets (7)

I believe the answer is:

toffees

I'm a little stuck... Click here to teach me more about this clue!

'sweets' is the definition.
(toffee is a kind of sweet)

'tees off munching' is the wordplay.
'tees off' can be anagrammed to 'TOFFEES'.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for toffees that I've seen before include "Caramels" , "Sweets" .)

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