Possible Clues:

• Pater, alas, coming to grief in gymnasium
• Most sickly-looking Gunners seen around a training facility
• Most lightly coloured soldiers hiding a training-ground
• Friend to stare at a Greek gym from the past
• Sparta has ale to be drunk in Greek training school
• Regularly spray leaders at break in gym
• 'Stubb was lustily singing out for someone to -- him up' (Moby Dick)
• In old athletics arena see a star leap about