Doctor and bishop join horde (3)
I believe the answer is:
mob
'join horde' is the definition.
'mob' can be an answer for 'horde' (I've seen this before). I'm not certain of the 'join' bit.
'doctor and bishop' is the wordplay.
'doctor' becomes 'mo' (medical officer).
'and' says to put letters next to each other.
'bishop' becomes 'b' (abbreviation used in chess).
'mo'+'b'='MOB'
Can you help me to learn more?
(Other definitions for mob that I've seen before include "Crowd round" , "Kind of cap" , "Rowdy lot" , "Crime syndicate or disorderly crowd" , "Unruly crowd" .)