Found in the following dictionaries
SOWPODS (Collins Scrabble Words)
"Cran" Definition
noun
A measure of herrings, either imprecise or sometimes legally specified; also rarely a barrel made to hold such a measure.
Source: Wiktionary
An embellishment played on the lowest note of a chanter of a bagpipe, consisting of a series of grace notes produced by rapid sequential lifting of the fingers of the lower hand.
Source: Wiktionary
A measure of fresh herrings, equivalent to 371/2 gallons.
Source: Oxford Dictionary