Crossword Genius

Disguised in Emerald Isle, a spy: Tees won't blab (2,4,3,6)

Ross

I believe the answer is:

my lips are sealed

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

'disguised in emerald isle a spy tees won't blab' is the definition.
I can't judge whether this defines the answer.

'disguised in emerald isle a spy tees won't blab' is the wordplay.
'emerald isle a spy' can be anagrammed to 'MY LIPS ARE SEALED'.
But, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for my lips are sealed that I've seen before include "I'll keep mum" , "I can't say" , "I won't say a word" .)

I've seen this clue in The Independent.
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