past mistress
noun
: a woman who is proficient or thorough in some particular respect : adept
a past mistress of storytelling 
Newsweek
Newsweek
Word History
Etymology
past (as in past master) + mistress
- level measure
- level of significance
- level off
- level out
- level playing field
- level premium
- level tablespoon
- level teaspoon
- level teaspoon/tablespoon
- level the playing field
- level up
- level with
- level-coil
- level-pegging
- level-wind
- leveled
- leveled off
- leveled out
- leveled up
- leveled with
- leveler
- levelers
- levelest
- levelheaded
- levelheadedness