Idiot thrashed over ridiculous flaw (7)

I believe the answer is:

halfwit

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

'thrashed over ridiculous flaw' is the wordplay.
'thrashed' becomes 'hit' (I can't justify this - if you can you should give a lot more credence to this answer).
'over' indicates putting letters inside.
'ridiculous' indicates an anagram.
'flaw' anagrammed gives 'alfw'.
'hit' enclosing 'alfw' is 'HALFWIT'.

Can you help me to learn more?

(Other definitions for halfwit that I've seen before include "Idiot" , "Being stupid" , "Charlie?" , "Mug" , "dunce?" .)

I've seen this clue in The Hindu.

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