It’s spindle; you have it, nfs.
Cause of legendary textile injury to actively dispel absorbing nitrogen (7)
WORDPLAY
actively [anagrind]
Plain text fodder {dispel} -> spidle
absorbing [containment indicator]
nitrogen [abbr.] N
-> spiNdle
WHOLE DEFINITION
Cause of legendary textile injury = spindle
(Sleeping Beauty pricked her finger on the spindle of the spinning wheel, and fell into a deep sleep for 100 years, along with all of the denizens of the castle. The original curse had her dying from the wound but the good fairy was able to transmute this into a 100-year sleep.)
Over to you.
