Starts to employ mindfulness practising tantric yoga bare (5)
I believe the answer is:
empty
'bare' is the definition.
('empty' can be similar in meaning to 'bare')
'starts to employ mindfulness practising tantric yoga' is the wordplay.
'starts to' says to take the initial letters.
The initial letters of 'employ mindfulness practising tantric yoga' is 'EMPTY'.
(Other definitions for empty that I've seen before include "Evacuate" , "Loneliness parents feel when their children leave home" , "Devoid of content" , "Arabic quarter" , "Unoccupied" .)