Please Sit Down
Tree nursery? NEST
It passes between Swiss banks AARE
Lab coat speck? FLEA [on a Golden Lab]
Castle with many steps? IRENE

Theme: kinds of seats but not necessarily rear ones
What many sports cars lack and {theme,
in a way} REARSEATS
Who knew?The queen delivered some speech in MDCI.
MEDE is an early Iranian [isn’t Iran itself new?]
OJORATING:

Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = Not much fun