Possible Clues:

• Unsubscribe to a mailing list, with 'out'
• Not join, with 'out'
• Not dither
• ___ out (get off a list)
• Make a selection, with 'for'
• Choose to put up around centre of Newport
• Choose between possibilities
• Get (out), or (in)
• Make a choice and compete regularly
• Decide on, with ''for''