For a curry recipe with a twist, try Anjum Anand's crab curry recipe.
If the whole peppercorn and cloves bother you, you can take strain the sauce and take them out before pouring the rest over the crab. This curry improves over a few hours as the sauce seeps into crab. I buy my crab fresh from my fishmongers who kindly offers to clean and cut it for me. I add about 4-5 tbs. of the brown meat that sits in the main shell of the crab for that extra flavour but you can add more or less.