Source : Webster's Revised Unabridged Dictionary (1913)

Clank \Clank\, v. t. [imp. & p. p. {Clanked}; p. pr. & vb. n.
   {Clanking}.]
   To cause to sound with a clank; as, the prisoners clank their
   chains.

Source : WordNet®

clanking
     adj : having a hard nonresonant metallic sound; "clanking chains";
           "the clanking arms of the soldiers near him"