Possible Clues:

• When school is open, I will go in as stop-gap
• Put in grave situation, I am not there for ever
• For a period when classes are happening without one
• Italian team on main road heading north for temporary period
• Fit and well-kept, full of energy for acting
• I note one in time becomes temporary
• Painter imagines capturing temporary period
• Short-term trendy cut involves energy
• Minister, no saint, could be temporary
• Trendy expression to describe current acting