Planes are moored somehow at this place? (9)
I believe the answer is:
aerodrome
'planes are moored somehow at this place?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
'are moored somehow at this place?' is the wordplay.
'are' becomes 'a' (the 'are' is a metric unit of area).
'somehow' indicates an anagram.
'at' says to put letters next to each other (I've seen this in other clues).
'this place?' becomes 'er' (I can't explain this - if you can you should give a lot more credence to this answer).
'moored' is an anagram of 'odrome'.
'odrome' put after 'er' is 'erodrome'.
'a'+'erodrome'='AERODROME'
Can you help me to learn more?
(Other definitions for aerodrome that I've seen before include "Point of arrival, perhaps" , "landing zone" , "Take windy Rome road East to the airfield" , "place that may be alighted on" , "where flight may terminate" .)