Crossword Genius

It's illuminating, in a way, during flight (8)

Ross

I believe the answer is:

fanlight

I'm a little stuck... Click here to teach me more about this clue!

'it's illuminating' is the definition.
I can't tell whether this definition defines the answer.

'a way during flight' is the wordplay.
'way' becomes 'n' (Compass direction - North).
'during' means one lot of letters goes inside another.
'a'+'n'='an'
'an' placed into 'flight' is 'FANLIGHT'.

'in' is the link.

Can you help me to learn more?

(Other definitions for fanlight that I've seen before include "Rectangular window over a door" , "Small window" , "Windows above a door" , "It enables us to see" , "elevated aperture" .)

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