What confuses pictures coming across (7)

I believe the answer is:

athwart

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'across' is the definition.
(athwart can mean across or over)

'what confuses pictures coming' is the wordplay.
'confuses' indicates anagramming the letters.
'pictures coming' becomes 'art' (I am not sure about the 'coming' bit.).
'what' anagrammed gives 'athw'.
'athw'+'art'='ATHWART'

Can you help me to learn more?

(Other definitions for athwart that I've seen before include "Crossing" , "Crosswise" , "Transverse; at an oblique angle" , "wrongly" , "What rat is placed across?" .)

I've seen this clue in The Globe and Mail.

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