Observable in attempt to cover tracks (5)

I believe the answer is:

overt

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

'observable' is the definition.
(I've seen this before)

'attempt to cover tracks' is the wordplay.
'OVERT' is hidden in amongst the letters.
However, I'm uncertain how the hidden word is indicated.

'in' acts as a link.

Can you help me to learn more?

(Other definitions for overt that I've seen before include "not disguised" , "Done in an obvious way" , "Plain and obvious" , "Voter (anag.)" , "Open and obvious" .)

I've seen this clue in The Globe and Mail.

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