Storm when the heart is out of range (4)
I believe the answer is:
rage
'storm' is the definition.
(I know that storm can be written as rage)
'the heart is out of range' is the wordplay.
'the heart' says to take the centre.
'is out' becomes 'forth' (I've seen this before).
'of range' becomes 'age' (I am not sure about this - if you are sure you should believe this answer much more).
The middle letter of 'forth' is 'r'.
'r'+'age'='RAGE'
'when' acts as a link.
Can you help me to learn more?
(Other definitions for rage that I've seen before include "Speak with great anger" , "Latest fashion; high emotion" , "Uncontrollable anger" , "Fierce anger" , "Be furious" .)