Crossword Genius

Disagreement blows up? (4)

Ross

I believe the answer is:

spat

'disagreement' is the definition.
(I know that spat is a type of dustup)

'blows up?' is the wordplay.
'blows' becomes 'taps' (tap is a kind of blow).
'up?' shows that the letters should be reversed in order (in down clue: letters go upwards).
'taps' written backwards gives 'SPAT'.

(Other definitions for spat that I've seen before include "Petty quarrel or fight" , "Reacted contemptuously" , "Observed" , "Slight argument" , "A small tiff or quarrel" .)

I've seen this clue in The Sun.
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