Crossword Genius

Invalidated cover? (3)

Ross

I believe the answer is:

lid

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

'invalidated cover?' is the definition.
'lid' can be an answer for 'cover?' (lid is a kind of cover). I am not certain of the 'invalidated' bit.

'invalidated cover?' is the wordplay.
'cover?' indicates a hidden word (I've seen 'covering' mean this).
'LID' is hidden in the letters of 'invalidated'.

Can you help me to learn more?

(Other definitions for lid that I've seen before include "Top for pot or jar" , "Covering" , "Hat" , "Cover for box or eye" , "Cap or top for container" .)

I've seen this clue in the Evening Standard.
Want a hint initially instead of a full solution? Install my app