Expert press writing (3,4)

I believe the answer is:

dab hand

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

'press writing' is the wordplay.
'press' becomes 'dab' (I can't justify this - if you can you should believe this answer much more).
'writing' becomes 'hand' ('hand' can refer to someone's handwriting).
'dab'+'hand'='DAB HAND'

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(Other definitions for dab hand that I've seen before include "An informal expert such as band had" , "Barely wash" , "cursory wash?" , "Past master" .)

I've seen this clue in The Telegraph.

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