Is it ever bashed in again when you get it back (8)

I believe the answer is:

retrieve

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'again when you get it back' is the definition.
I can't tell whether this definition defines the answer.

'is it ever bashed in' is the wordplay.
'is it' becomes 'trie' (I can't explain this - if you can you should believe this answer much more).
'bashed' is an anagram indicator.
'in' means one lot of letters goes inside another.
'ever' with letters rearranged gives 'reve'.
'trie' going within 'reve' is 'RETRIEVE'.

Can you help me to learn more?

(Other definitions for retrieve that I've seen before include "Recover" , "Win back" , "Find and bring back" , "Get back or fetch" , "Get or bring back something" .)

I've seen this clue in the Evening Standard.

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