Listen to the chap who has a warm heart (4)

I believe the answer is:

hear

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'listen to' is the definition.
(to hear something is to listen to it)

'chap who has a warm heart' is the wordplay.
'chap who' becomes 'he' (I can't justify this - if you can you should believe this answer much more).
'has' says to put letters next to each other.
'heart' means to look at the middle letters.
The central letters of 'warm' are 'ar'.
'he'+'ar'='HEAR'

'the' is the link.

Can you help me to learn more?

(Other definitions for hear that I've seen before include "Try (in court)" , "Perceive aurally" , "Listen to" , "attend" , "Perceive with the ear" .)

I've seen this clue in the Evening Standard.

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