Possible Clues:

• They are all in line
• Connolly, Kent and Mac Diarmada in Garda Barracks
• 'They're on-line, but not for computers (8)'
• Lads collecting rubbish before one's train stops
• Positions associated with comfort, action or panic
• ... stops boys receiving poor quality information
• Stops prescribed drugs with nothing in
• Halting places on 19ac
• Stops at the end of 15 across
• Relatives collecting rubbish from island stops along the way