Physician flipping cross bandaging cut, lacking heart (6)
I believe the answer is:
doctor
'physician' is the definition.
(synonyms)
'flipping cross bandaging cut lacking heart' is the wordplay.
'flipping' shows that the letters should be reversed in order.
'cross' becomes 'rood' (term for a crucifix).
'bandaging' indicates putting letters inside.
'lacking heart' suggests removing the centre.
'cut' with its centre taken out is 'ct'.
'rood' written backwards gives 'door'.
'door' placed around 'ct' is 'DOCTOR'.
(Other definitions for doctor that I've seen before include "Physician" , "Licensed medical practitioner" , "Foster, Who, Jekyll or Livingstone" , "bones" , "Who perhaps" .)