Doctor at hospital bearing material (6)
I believe the answer is:
mohair
'material' is the definition.
(mohair is a kind of material)
'doctor at hospital bearing' is the wordplay.
'doctor' becomes 'mo' (medical officer).
'at' says to put letters next to each other.
'hospital' becomes 'h' (abbreviation for hospital on maps).
'bearing' becomes 'air' (both can mean an attitude or pose).
'mo'+'h'+'air'='MOHAIR'
(Other definitions for mohair that I've seen before include "Fine silky wool of the angora goat" , "Yarn provided by goats" , "Fine silky coat of angora goat" , "Goat's silky coating as material for shiny clothes" , "coat required" .)