Possible Clues:

• Place for sitting president to support American marines
• Restful location in which time-wasting matriarch unwound?
• Member with seat taking no active role
• Type of critic having no standing?
• Place to sit
• After a jolly tea I start to rest in this?
• Amateur recording artists, initially rejected, getting a great deal less done on air?
• "All in the Family" prop
• Wherein a critic, theoretically, gets support from both sides
• A marine professor's position is conducted from the comfort of home