Unnatural pose to employ in embrace (7)
I believe the answer is:
espouse
'embrace' is the definition.
('espouse' can be a synonym of 'embrace')
'unnatural pose to employ' is the wordplay.
'unnatural' indicates an anagram.
'to employ' becomes 'use' ('use' can be a synonym of 'employ').
'pose' is an anagram of 'espo'.
'espo'+'use'='ESPOUSE'
'in' acts as a link.
(Other definitions for espouse that I've seen before include "Champion or support, as with a cause" , "Marry -- take on as a cause" , "Adopt or support, say a cause" , "help!" , "Take on, a cause say" .)