Her pilot worked out where aircraft should land (8)
I believe the answer is:
heliport
'where aircraft should land' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'her pilot worked' is the wordplay.
'worked' is an anagram indicator.
'her'+'pilot'='herpilot'
'herpilot' anagrammed gives 'HELIPORT'.
'out' is the link.
Can you help me to learn more?
(Other definitions for heliport that I've seen before include "Home for choppers?" , "Landing-place" , "Landing place for small aircraft" , "Drome for choppers" , "Rotary-winged landing place" .)