Prepared to interpret writing that is heart rending (7)

I believe the answer is:

readied

'prepared' is the definition.
(I've seen this in another clue)

'interpret writing that is heart rending' is the wordplay.
'interpret writing' becomes 'read' (I've seen this before).
'that is' becomes 'ie' (abbreviation for id est, 'that is' in Latin).
'heart' says to take the centre.
The middle letter of 'rending' is 'd'.
'read'+'ie'+'d'='READIED'

'to' acts as a link.

(Another definition for readied that I've seen is " Made fit ot prepared for action".)

I've seen this clue in the Sydney Morning Herald.

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