I can’t be the only one who finds this frustrating and annoying!
Why can’t you remove watchlist items from within the watchlist tab?
Would make it so much easier to manage.
Yes there is a pencil at top right corner click and the red x shows up 
Not on my iPhone there isn’t I’m afraid.
Oh I have an iPhone how strange
Hold that thought, ok, I close and reopened the app and now I see what you mean. Thank you. Case closed.