Courage needed when you learn trouble's starting (5)

I believe the answer is:

heart

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'courage' is the definition.
(I know that heart is a type of courage)

'learn trouble's starting' is the wordplay.
'learn' becomes 'hear' (synonyms).
'starting' indicates taking the first letters.
The initial letter of 'troubles' is 't'.
'hear'+'t'='HEART'

'needed when you' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for heart that I've seen before include "Body organ" , "Feeling" , "Red card" , "Not a club" , "Core - card" .)

I've seen this clue in the Evening Standard.

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