Strangeness seen in a time where deceit is hidden (8)

'strangeness' is the definition.
(alienage is a kind of strangeness)

'a time where deceit is hidden' is the wordplay.
'a' becomes 'an'.
'time where' becomes 'age' (an age is a period of time. I am not sure about the 'where' bit.).
'deceit' becomes 'lie' (I've seen this in other clues).
'is hidden' means one lot of letters goes inside another.
'an'+'age'='anage'
'anage' going around 'lie' is 'ALIENAGE'.

'seen in' is the link.

Can you help me to learn more?