Possible Clues:

• That is little fellow, betrayed earlier, to keep going
• Quickly holding hands, about to fail, but keep going
• Tommy about to keep going
• Persevere? I'd sooner go crazy drinking lager top
• Current in fuse applied to keep going
• Solo diner forced to plough through
• Disciple grabbing senior, one bound to keep going
• Keep going, having disposed of energy guzzling appliance
• Major characters at the end of 27 across don't give up
• Stick to one's guns in the army going forward, in a timely sense