Whisper about entering tub with European (7)

I believe the answer is:

breathe

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'whisper' is the definition.
(I've seen this in another clue)

'about entering tub with european' is the wordplay.
'about' means one lot of letters goes inside another.
'entering' becomes 're' (I've seen this in other clues).
'tub' becomes 'bath' (synonyms).
'with european' becomes 'e' (abbreviation e.g. EU. I am not sure about the 'with' bit.).
're' placed within 'bath' is 'breath'.
'breath'+'e'='BREATHE'

Can you help me to learn more?

(Other definitions for breathe that I've seen before include "live" , "Draw air into, and expel out of, the lungs" , "Inspire and expire air" , "Absorb air" , "Inhale and exhale" .)

I've seen this clue in The Telegraph.

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