Height of Boeing occasionally overlooked (3)
I believe the answer is:
ben
'height' is the definition.
Although both the answer and definition are singular nouns, I don't understand how they can define each other.
'boeing occasionally overlooked' is the wordplay.
'occasionally overlooked' means one should take alternating letters (letters removed at regular intervals).
The alternating letters of 'boeing' are 'BEN'.
'of' is the link.
Can you help me to learn more?
(Other definitions for ben that I've seen before include "inner room in Oban, say" , "A Scottish mountain like Nevis" , "Big . . . is a famous London clock-tower" , "A Gaelic mountain like Bulben" , "High mountain (Scots)" .)