Related Clues:

• Article in Ireland abridged: any one of two?
• That one or this one
• Disjunctive conjunction
• "Whichever"
• ... reportedly an earlier insect, perhaps?
• Possibly become empty after a month
• Picked up morning Times, upset over Spain, perhaps
• "Both would be fine"
• Wishy-washy word
• "Both will do"
• Flexible reply to "Which one?"