Doctor raised to have love for staff (3)
I believe the answer is:
rod
'for staff' is the definition.
(both can mean a pole or stick)
'doctor raised to have love' is the wordplay.
'doctor' becomes 'dr' (abbreviation).
'raised' says the letters should be written backwards (going up in a down clue).
'to have' indicates putting letters inside.
'love' becomes 'o' (love means zero in tennis).
'dr' backwards is 'rd'.
'rd' enclosing 'o' is 'ROD'.
(Other definitions for rod that I've seen before include "Cane used for flogging" , "Flexible stick for 11 Down" , "Cane - shaft" , "16.5 feet" , "Stick - measure" .)