Example: They finally have the wrinkles pretty well ironed out.
source: wordnet30
a clever method of doing something (especially something new and different)(noun.cognition)
source: wordnet30
A winkle.(noun)
source: webster1913
A small ridge, prominence, or furrow formed by the shrinking or contraction of any smooth substance; a corrugation; a crease; a slight fold; as, wrinkle in the skin; a wrinkle in cloth.(noun)
source: webster1913
verb (v)
gather or contract into wrinkles or folds; pucker(verb.contact)