Attempt to hear the middle of Bliss number (6)

I believe the answer is:

listen

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'attempt to hear' is the definition.
I can't judge whether this defines the answer.

'middle of bliss number' is the wordplay.
'middle of' indicates the central letters.
'number' becomes 'ten' (ten is a number).
The central letters of 'bliss' are 'lis'.
'lis'+'ten'='LISTEN'

'the' acts as a link.

Can you help me to learn more?

(Other definitions for listen that I've seen before include "Pay heed (to advice)" , "Follow advice" , "16 (anag.)" , "Lend an ear (6)" , "Harken" .)

I've seen this clue in The Times.

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