Wooded area; to the police, it's right on the map (5)
I believe the answer is:
copse
'wooded area' is the definition.
(I've seen this in another clue)
'the police it's right on the map' is the wordplay.
'the police' becomes 'cops' (cop can informally mean a police officer).
'it's right on the map' becomes 'e' (I can't justify this - if you can you should give a lot more credence to this answer).
'cops'+'e'='COPSE'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for copse that I've seen before include "Stand of trees" , "Wood - thicket" , "Small thicket" , "Dense growth of bushes or trees" , "Cultivated woodland area" .)