Mark last word in order for treatment (10)
I believe the answer is:
medicament
'treatment' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'mark last word in order' is the wordplay.
'mark' becomes 'm'.
'last word' becomes 'amen' (I've seen this before).
'in' is an insertion indicator.
'order' becomes 'edict' ('edict' can be a synonym of 'order'**).
'amen' inserted within 'edict' is 'edicament'.
'm'+'edicament'='MEDICAMENT'
'for' acts as a link.
Can you help me to learn more?
(Other definitions for medicament that I've seen before include "Curative substance" , "Healing substance" , "drug?" .)