Crossword Genius

Exotic Parsee lady smiles briefly and I'm speechless! (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!

'i'm speechless' is the definition.
I can't tell whether this defines the answer.

'exotic parsee lady smiles briefly' is the wordplay.
'exotic' indicates anagramming the letters (an unusual form of the letters).
'briefly' means to remove the last letter.
'parsee'+'lady'+'smiles'='parseeladysmiles'
'parseeladysmiles' with its final letter taken away is 'parseeladysmile'.
'parseeladysmile' anagrammed gives 'MY LIPS ARE SEALED'.

'and' is the link.

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 Guardian.
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