He shows the way to a romantic heart (4)
I believe the answer is:
sean
'he' is the definition.
'the way to a romantic heart' is the wordplay.
'the way' becomes 'se' (I am not sure about this - if you are sure you should believe this answer much more).
'to' means one lot of letters go next to another.
'heart' says to take the centre.
The centre of 'romantic' is 'an'.
'se'+'an'='SEAN'
'shows' acts as a link.
Can you help me to learn more?
(Other definitions for sean that I've seen before include "- - Connery (007)" , "Penn, Bean or O'Casey" , "Irish form of John" , "guy at Number 10 [IRISHMAN]" .)