Possible Title:
The DoorsGood Ones: Velvet finish? EEN
Gadget you can count on ABACUS
Slow, to Schumann LENTO [clue is German; answer Italian, but universal music direction]
Well-heeled Marcos IMELDA [viz. her shoes]
Theme: Two kinds of doors comprise a phrase
Where some carry keys FRONTPOCKET
Peugot or Renault, e.g. FRENCHCAR
Behind-the-scenes area BACKSTAGE
Campaign in rural areas BARNSTORM
School entrances {and theme} DOUBLEDOORS
By the Way:This gem not only has an entry that made me laugh aloud (IMELDA) it has a most inventive theme, along with a clever theme summary (DOUBLEDOORS).
RATING:

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