Exact hand details aren't relevant, but the key points here are (a) you are very interested in a heart slam, (b) you have two club losers in your hand, (c ) all other suits are controlled.
In this situation, there's obviously a concern that partner has only the ♣K and we could be off the first two to ♣AQ with East.
Questions for the experts:
1. Do you just ignore this and trust that much/most of the time partner will have the ♣A and East is doubling with secondary club honors?
2. After the double, do you have a way to check back w/ partner about whether his club control is the ♣A?
3. Do you have methods to both do #2 AND get partner to play 6N if he only holds the ♣K?