Jack's greeting to a bit of a hoyden? (4)
I believe the answer is:
ahoy
'jack's greeting' is the definition.
'ahoy' can be an answer for 'greeting' (I have seen 'Nautical greeting' mean 'ahoy' so perhaps 'greeting' could also mean 'ahoy'). I am not sure about the 'jack's' bit.
'a bit of a hoyden?' is the wordplay.
'bit of a hoyden?' becomes 'hoy' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'hoy'='AHOY'
'to' is the link.
Can you help me to learn more?
(Other definitions for ahoy that I've seen before include "Naval call for attention" , "Nautical greeting" , "Coastal land" , "Cry at sea" , "Sailor's shout to ship" .)