Some may say sex worker has a stout rope (6)
I believe the answer is:
hawser
'a stout rope' is the definition.
'hawser' can be an answer for 'rope' (hawser is a kind of rope). I am not certain of the 'a stout' bit.
'some may say sex worker' is the wordplay.
'some may say' becomes 'haw' (may is a kind of haw).
'sex worker' becomes 'ser' (I can't explain this - if you can you should believe this answer much more).
'haw'+'ser'='HAWSER'
'has' is the link.
(Other definitions for hawser that I've seen before include "Thick mooring rope" , "Heavy cable for securing ships" , "Heavy rope for nautical use" , "Fastener" , "A strong rope, maybe of steel" .)