Study, shift and change mail direction details? (9)

I believe the answer is:

readdress

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'change mail direction details?' is the definition.
I can't tell whether this defines the answer.

'study shift' is the wordplay.
'study' becomes 'read' (synonyms).
'shift' becomes 'dress' (shift can mean a dress).
'read'+'dress'='READDRESS'

'and' acts as a link.

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(Other definitions for readdress that I've seen before include "Have another look at" , "change direction" , "tackle again" , "forward" .)

I've seen this clue in The Guardian.

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