One expression of "kure" is the plain form of kudasai, used when reporting indirect requests for instance. Such as "Haha wa watashi ni katte kure to iimashita" (My mother told me to please buy it).
There may be other uses I'm just not thinking of at the moment, though.
Yes, actually it is the imperative of kureru, I just checked. Sorry about that. Kudasai and kure are both imperatives in fact, the latter just being more informal and conversational.