DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   clinker
       n 1: a fragment of incombustible matter left after a wood or
            coal or charcoal fire [syn: cinder, clinker]
       2: a hard brick used as a paving stone [syn: clinker, clinker
    brick]
       v 1: clear out the cinders and clinker from; "we clinkered the
            fire frequently"
       2: turn to clinker or form clinker under excessive heat in
          burning