Possible Clues:

• Wander to collect contraption
• By this, Sir, 15 across is handy
• Flit around and obtain appliance
• By this, Sir, get something useful
• Does a TD need this device to get an egg?
• After good notice, acquire device
• Puff after middle-age and obtain this useful device
• The yoke you get in the end
• Handy device
• Appliance of modern-day force: get out of it!