Sent first couple text about group (6)

I believe the answer is:

sextet

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'group' is the definition.
The answer is an example.

'sent first couple text about' is the wordplay.
'first couple' can mean two substitutions for 'first'.
'first' indicates taking the first letters.
'first' becomes 'e' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'about' indicates an anagram.
The initial letter of 'sent' is 's'.
'text' anagrammed gives 'xtet'.
's'+'e'+'xtet'='SEXTET'

Can you help me to learn more?

(Other definitions for sextet that I've seen before include "Group of six players" , "Half-dozen in a group" , "Three couples" , "band" , "Music for six" .)

I've seen this clue in The Daily Express.

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