Possible Clues:

• Some friendships are sort of solid
• Spiritual father swallows liberal medicine
• Ring a second time, perhaps? Take that back!
• Concerning old Greek philosopher or a soul relationship
• Start with the plural, then have something singular with your gin in the way of the philosopher
• Short drama, a stimulant, is non-romantic
• Non-sexual (friendship)
• Group of soldiers, none the less, in charge of old philosopher
• Descriptive of a friendship-only relationship
• Describes a friendship that's free from physical desire