What is the required cloud clearance in G airspace when there are clouds just above in class E airspace?
KDKK is under a Class E shelf starting at 700 ft AGL (Magenta vignette around the airport).  If the airport elevation starts at 692’ MSL, the Class E shelf will begin at 1392 ft MSL.  Therefore operation at 1800 ft MSL above KDKK will put you in Class E airspace and subject to the VFR weather minimums of 3 sm visibility and 1000 ft above / 500 ft below / 2000 ft lateral cloud clearances.

As the the second question, clear of clouds means remain in a position outside of clouds and a flightpath which will not place you in immediate risk of entering a cloud.