Comment on a text’s superficial appearance (5)

I believe the answer is:

gloss

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This clue might be a double definition.

'comment on a text's' is the first definition.
'gloss' can be an answer for 'comment' (thesaurus). I am not sure about the 'on a text's' bit.

'superficial appearance' is the second definition.
(I've seen this before)

Can you help me to learn more?

(Other definitions for gloss that I've seen before include "explanation for obscure word" , "Show" , "translation" , "Surface shine" , "phrase's explanation" .)

I've seen this clue in The Times.

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