Whisper, about to go in to get clean (7)
I believe the answer is:
breathe
'whisper' is the definition.
(I've seen this before)
'to go in to get clean' is the wordplay.
'to go' becomes 're' (I've seen this in other clues).
'in' is an insertion indicator.
'to get clean' becomes 'bathe' (I've seen this in another clue).
're' going inside 'bathe' is 'BREATHE'.
'about' is the link.
(Other definitions for breathe that I've seen before include "Inhale/exhale" , "Absorb air" , "Take into mouth" , "Tell" , "Take in 30" .)