Doctor with blade and scoop (6)
I believe the answer is:
dredge
'scoop' is the definition.
(I've seen this in another clue)
'doctor with blade' is the wordplay.
'doctor' becomes 'Dr' (abbreviation).
'with' means one lot of letters go next to another.
'blade' becomes 'edge' (as in a sharpened edge).
'dr'+'edge'='DREDGE'
'and' is the link.
(Other definitions for dredge that I've seen before include "Dig up mud from river or canal bed" , "Clear a channel" , "Scoop out (bed of harbour, river, etc.)" , "Dig out mud from (waterway)" , "Scrape up material from sea bed" .)