Related Clues:

• Antithesis of apathy
• __ bar
• Solar product
• Type of rally
• ''Joie de vivre''
• It can be conserved
• Vivacity, musically
• __ squad
• Allegro con __
• Part of an Einsteinian equation
• Military capability
• Prompt willingness
• Gusto, in Genoa
• Extra effort
• Verve, Italian style