Counterpart (6)
'counterpart' is the definition.
(I know that counterpart can be written as twin)
This is the entire clue.
(Other definitions for twin that I've seen before include "indistinguishable from the next?" , "Identical sibling" , "Dead ringer" , "Make association" , "Very much like" .)
'counterpart' is the definition.
(both can mean an associate)
This is the entire clue.
(Other definitions for oppo that I've seen before include "China" , "Mate" , "Counterpart; rival" , "Opposite number (colloq.)" , "Colleague, friend (colloq.)" .)
'counterpart' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for fellow that I've seen before include "Boy or man" , "Informal chap, or member of learned society" , "The other of a pair - just a chap" , "Informally, a man, or the other of a pair" , "Colleague" .)
'counterpart' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for parallel that I've seen before include "When everywhere is equidistant and not intersecting" , "Maintaining distance apart" , "Imaginary line round the Earth" , "Circle of constant latitude" , "Match" .)