As needed, in Rx's, 3 letters
Boogie Nights theme, 3 letters
As needed, to a pharmacist, 3 letters
Take as needed: pharm., 3 letters
Wild suspicion, 3 letters
Automatic-transmission letters, 5 letters
Common gearshift sequence, 5 letters
Gearshift letters, 5 letters
Gearshift sequence, 5 letters
Gearshift sequence, often, 5 letters
Shift sequence, 5 letters
Shifting letters, 5 letters
Shifting sequence, 5 letters
Almost a 19th C. classic?, 13 letters