To start breaking records, you need heart! (4)

I believe the answer is:

core

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'to start' is the definition.
(thesaurus)

'breaking records you need heart' is the wordplay.
'breaking records you' becomes 'cor' (I can't explain this - if you can you should give a lot more credence to this answer).
'need' becomes 'press' (press is a kind of need).
'heart' says to take the centre.
The central letter of 'press' is 'e'.
'cor'+'e'='CORE'

Can you help me to learn more?

(Other definitions for core that I've seen before include "Central zone" , "Centre, heart" , "The centre part, as of an apple" , "Heal" , "Drilled rock sample" .)

I've seen this clue in the Evening Standard.

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