Crossword Genius

Clearly evident, spectrum lacking in orange and green (5)

Ross

I believe the answer is:

overt

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

'clearly evident' is the definition.
'overt' can be an answer for 'evident' (I've seen this before). I'm not certain of the 'clearly' bit.

'spectrum lacking in orange and green' is the wordplay.
'spectrum' becomes 'range' (I've seen this before).
'lacking in' indicates named letters should be taken away.
'and' is a charade indicator (letters next to each other).
'green' becomes 'vert' (I've seen this before).
'orange' with 'range' taken away is 'o'.
'o'+'vert'='OVERT'

Can you help me to learn more?

(Other definitions for overt that I've seen before include "not disguised" , "Explicit" , "Open, not secret or hidden" , "Plain to see - manifest" , "Plain and obvious" .)

I've seen this clue in The Times.
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