It’s clear anger does exhaust one (8)
I believe the answer is:
overtire
'exhaust one' is the definition.
'overtire' can be an answer for 'exhaust' (to exhaust is to tire out). I am not sure about the 'one' bit.
'it's clear anger' is the wordplay.
'it's clear' becomes 'overt' (both can mean apparent or obvious).
'anger' becomes 'ire' (ire is intense rage).
'overt'+'ire'='OVERTIRE'
'does' is the link.
Can you help me to learn more?
(Other definitions for overtire that I've seen before include "tax too much" , "Get excessively weary" .)