Not entirely calm, one rushed old hospital worker (7)
I believe the answer is:
almoner
'old hospital worker' is the definition.
(historical term for a hospital social worker)
'not entirely calm one rushed' is the wordplay.
'not entirely' indicates the answer is hidden within the clue.
'ALMONER' is hidden in the letters of 'calm one rushed'.
(Other definitions for almoner that I've seen before include "Man role (anag.)" , "Former social worker" , "Official giving out aid" , "Former officer giving relief to the poor" , "one gave away?" .)