Leaving, possibly for Maidenhead (4)
I believe the answer is:
from
'leaving' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'possibly for maidenhead' is the wordplay.
'possibly' indicates an anagram.
'maidenhead' becomes 'm' (head letter of 'maiden').
'for' anagrammed gives 'fro'.
'fro'+'m'='FROM'
Can you help me to learn more?
(Other definitions for from that I've seen before include "Sent by" , "Beginning at; out of" , "Springing out of" .)