Get the F Out
Not spare the rod? DOWSE [dowsing rods are used to find water]
Theme: how to read a phrase with the final F removed
Non-contraband cheese? LEGALBRIE
Disappearing sound, and {theme} PFFT 
Theme entry MINIATUREGAUL doesn’t work here since GAUL is not pronounced the same way as GOL as in
golf.

H.S. dropout’s exam GED [is that the exam name or the goal]
RATING:

Three grins = Loved it; Two grins = Enjoyed it; One grin = A bit bland for my taste; One teardrop = No fun