Heavenly secretary spoke about the end of faxes (9)
I believe the answer is:
paradisal
'heavenly' is the definition.
(similar in meaning)
'secretary spoke about the end of faxes' is the wordplay.
'secretary' becomes 'pa' (abbreviation for personal assistant).
'spoke' becomes 'radial' (as in a wheel spoke).
'about' indicates putting letters inside.
'the end of' suggests the final letters.
The last letter of 'faxes' is 's'.
'radial' enclosing 's' is 'radisal'.
'pa'+'radisal'='PARADISAL'
(Other definitions for paradisal that I've seen before include "Like heaven or Eden" , "Perfect" .)