Stay for act including clairvoyance (7)
I believe the answer is:
respite
'stay' is the definition.
(thesaurus)
'act including clairvoyance' is the wordplay.
'act' becomes 'rite' (rite is a kind of act**).
'including' means one lot of letters goes inside another.
'clairvoyance' becomes 'esp' ('esp' can be a synonym of 'clairvoyance').
'rite' placed around 'esp' is 'RESPITE'.
'for' acts as a link.
(Other definitions for respite that I've seen before include "Pause from exertion, etc" , "Pause; reprieve" , "Brief period of relief" , "Break from doing something" , "interruption" .)