Crossword Genius

Outcasts’ former terrible lies (6)

Ross

I believe the answer is:

exiles

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'outcasts' former terrible lies' is the definition.
Although both the answer and definition are verbs in their -s form, I don't understand how they can define each other.

'former terrible lies' is the wordplay.
'former' becomes 'ex'.
'terrible' indicates anagramming the letters.
'lies' is an anagram of 'iles'.
'ex'+'iles'='EXILES'

Can you help me to learn more?

(Other definitions for exiles that I've seen before include "They have been driven from their native land" , "They are forced to live abroad" , "They live away from their homeland" , "They go abroad, maybe to escape tax" , "They are forced to live in foreign countries" .)

I've seen this clue in the Evening Standard.
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