Not all women have the name 'Susan', if you follow (5)
I believe the answer is:
ensue
'you follow' is the definition.
'ensue' can be an answer for 'follow' (ensue can mean to follow or happen as a result). I am unsure of the 'you' bit.
'not all women have the name susan' is the wordplay.
'not all women have' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'the name' becomes 'n' (common abbreviation e.g. on forms).
'susan' becomes 'sue' (short for Susan).
'e'+'n'+'sue'='ENSUE'
'if' acts as a link.
Can you help me to learn more?
(Other definitions for ensue that I've seen before include "Proceed" , "Happen - to come later" , "Happen afterwards as a result" , "Follow subsequently" , "Come along afterwards" .)