In hiding his heavy heart, makes a name (3)
I believe the answer is:
ian
'a name' is the definition.
'in hiding his heavy heart makes' is the wordplay.
'in' is an insertion indicator.
'hiding his heavy' becomes 'in' (I am not sure about this - if you are sure you should believe this answer much more).
'heart' says to take the centre.
'makes' becomes 'has' ('have' can be a synonym of 'make').
The central letter of 'has' is 'a'.
'in' enclosing 'a' is 'IAN'.
Can you help me to learn more?
(Other definitions for ian that I've seen before include "- - Wallace (baritone)" , "The familiar Dr Paisley" , "Male" , "Scottish John" , "Scottish man's name" .)