Crossword Genius

To return in top cover? Blather! (3,3)

Ross

I believe the answer is:

hot air

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'blather' is the definition.
(I've seen this in another clue)

'to return in top cover?' is the wordplay.
'return' is a reversal indicator.
'in' means one lot of letters goes inside another.
'top cover?' becomes 'hair' (hair is a kind of cover. I am not sure about the 'top' bit.).
'to' back-to-front is 'ot'.
'ot' inserted inside 'hair' is 'HOT-AIR'.

Can you help me to learn more?

(Other definitions for hot air that I've seen before include "nothing worth listening to" , "Bombast or balloon filler" , "Guff" , "Boastful talk or balloon filling" , "Boastful talk or balloon filler" .)

I've seen this clue in the Sydney Morning Herald.
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