Wordnet 3.0
ADJECTIVE (1)
1. 
 having a hard nonresonant metallic sound; 
- Example: "clanking chains"- Example: "the clanking arms of the soldiers near him"
The Collaborative International Dictionary of English v.0.48:
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.
   [1913 Webster]
WordNet (r) 3.0 (2006):
clanking
    adj 1: having a hard nonresonant metallic sound; "clanking
           chains"; "the clanking arms of the soldiers near him"