Like Cora, wild about the man who blew the whistle (4,3)
I believe the answer is:
care for
'like cora wild about the man who blew the whistle' is the definition.
'care for' can be an answer for 'like' (I've seen this in another clue). I am not sure about the remainder of the definition.
'like cora wild about the man' is the wordplay.
'like' becomes 'ef' (I am not sure about this - if you are sure you should believe this answer much more).
'wild' indicates an anagram.
'about' means one lot of letters goes inside another.
'the man' becomes 'r' (abbreviation for rook, a chess piece or 'man').
'cora' is an anagram of 'caro'.
'ef' inserted inside 'caro' is 'carefo'.
'carefo'+'r'='CARE FOR'
Can you help me to learn more?
(Another definition for care for that I've seen is " Look after".)