They have schemes they map out on paper (8)
I believe the answer is:
plotters
'they' is the definition.
Both the definition and answer are plural nouns.
Maybe you can see a link between them that I can't see?
'schemes they map out on paper' is the wordplay.
I cannot really see how this works, but
'map' could be 'plot' (synonyms) and 'plot' is present in the answer.
This explanation may well be incorrect...
'have' is the link.
Can you help me to learn more?
(Other definitions for plotters that I've seen before include "eg, Guy Fawkes and co" , "People planning" .)