The actual clue was- 41a (Especially of cancer cells ) to spread to a new site in the body via blood or lymph vessels
So we are looking for a verb not a type of cancer
harvey may not be able to thank you though ronayne- he/she hasn't acknowledged answers to any of his/her last 30 questions - but I assume that's because he/she has an old browser that doesn't allow posters to post on their own threads
Thanks ronayne.
harvey- you might want to upgrade your browser to a version which would enable you to participate in your own threads as some might be mistakenly under the impression that you are ungrateful for all the help you receive