President leaving Hampstead going west — it's on the front page (8)
I believe the answer is:
masthead
'president leaving hampstead going west' is the definition.
I can't judge whether this defines the answer.
'on the front page' is the wordplay.
'on' says to put letters next to each other.
'the front' becomes 'head'.
'page' becomes 'mast' (I am not sure about this - if you are sure you should believe this answer much more).
'head' put after 'mast' is 'MASTHEAD'.
'it's' acts as a link.
Can you help me to learn more?
(Other definitions for masthead that I've seen before include "magazine's title" , "Heading with name of newspaper" , "Printed newspaper details" , "flag" , "Name of paper at top of front page" .)