1.  crackling(n = noun.substance) greaves - the residue that remains after animal fat has been rendered;
is a kind of residue

2.  crackling(n = noun.event) crackle, crepitation - the sharp sound of snapping noises;
is a kind of noise
has particulars: decrepitation
Derived form verb crackle₁

1.  The making of small, sharp cracks or reports, frequently repeated. [1913 Webster]
"As the crackling of thorns under a pot, so is the laughter of the fool." [1913 Webster]

2.  The well-browned, crisp rind of roasted pork. [1913 Webster]
"For the first time in his life he tested crackling." [1913 Webster]

3.  Food for dogs, made from the refuse of tallow melting. [1913 Webster]

crackling, n.
1 the crisp skin of roast pork.
2 joc. or offens. attractive women regarded collectively as objects of sexual desire.

Idiom:
bit of crackling colloq. an attractive woman.