[clarinet]

Scherzo, I do apologise for the tardy reply - for an unknown reason I have been having trouble logging in and have re-registered with a different user name to try and solve the problem.
The particular pdf files I wanted to cut contain both a piano score ( with clarinet stave above the piano part for the accompanist's info), and a separate clarinet part, both in a single pdf.
I have been able to achieve what I need using the helpful ideas shown above. Thank you very much for your interest.
Brian