as clear as mud

: bright, luminous

: cloudless

: free from mist, haze, or dust

: in a clear manner

: all the way

: to make clear or translucent

: to free from pollution or cloudiness

: to free from accusation or blame : exonerate, vindicate

: a clear space or part

: a high arcing shot over an opponent's head in badminton

: a slimy sticky mixture of solid material with a liquid and especially water

: abusive and malicious remarks or charges

: anathema

: to make muddy or turbid

: to treat or plaster with mud