Crossword Genius

I'm taken aback about swamp (4)

Ross

I believe the answer is:

mire

'swamp' is the definition.
(thesaurus)

'i'm taken aback about' is the wordplay.
'taken aback' says the letters should be written backwards.
'about' becomes 're' (regarding**).
'im' in reverse letter order is 'mi'.
'mi'+'re'='MIRE'

(Other definitions for mire that I've seen before include "Bog down in swamp" , "(Stretch of) clinging mud" , "Soft mud or dirt" , "Bog - muck" , "Stretch of boggy ground" .)

I've seen this clue in The Times.
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