Bill can get a kiss out of Elsie, initially (5)
I believe the answer is:
'bill can get a kiss out of elsie initially' is the definition.
I can't tell whether this definition defines the answer.
'bill can get a kiss out of elsie initially' is the wordplay.
'bill' becomes 's' (I am not sure about this - if you are sure you should believe this answer much more).
'can' indicates anagramming the letters (I've seen 'canned' mean this (canned can mean drunk)).
'get' means one lot of letters go next to another.
'out of' means to remove the last letter (I've seen 'out' mean this).
'initially' says to take the initial letters.
The initial letter of 'elsie' is 'e'.
'kiss' with its final letter taken off is 'kis'.
'kis' next to 'e' is 'kise'.
'kise' anagrammed gives 'ikes'.
Can you help me to learn more?
(Other definitions for sikes that I've seen before include "Bill - - in 'Oliver Twist'" , "Dickensian villain" , "Bill, the villain" .)