Statesman a hothead can possibly hate (5)
I believe the answer is:
heath
'statesman' is the definition.
(I've seen this before)
'a hothead can possibly hate' is the wordplay.
'a hothead can' becomes 'h' (I am not sure about this - if you are sure you should believe this answer much more).
'possibly' indicates anagramming the letters.
'hate' with letters rearranged gives 'eath'.
'h'+'eath'='HEATH'
Can you help me to learn more?
(Other definitions for heath that I've seen before include "Sir Edward - , PM" , "blasted place?" , "Area of open land with gorse etc" , "part of Hampstead" , "Place of gorse/heather" .)