Where one might land a drug — bar to the north of city (9)
I believe the answer is:
aerodrome
'where one might land' is the definition.
(I've seen this before)
'a drug bar to the north of city' is the wordplay.
'drug bar' becomes 'dore' (I am not sure about this - if you are sure you should believe this answer much more).
'to the north of' shows that the letters should be reversed in order (I've seen 'to the north' mean this).
'city' becomes 'Rome' (Rome is an example).
'dore' in reverse letter order is 'erod'.
'a'+'erod'+'rome'='AERODROME'
Can you help me to learn more?
(Other definitions for aerodrome that I've seen before include "landing area" , "place that may be alighted on" , "Where one might land" , "Small airfield" , "Small airport" .)