Tip 3: "Bid your slams!"
6 was cold. How to get there?
This East should perhaps bid 4 after 3 to say "I am with you in clubs, and I have the A - are you interested?"
Perhaps West should rebid 3 and not 3 as there is no guarantee that East had 5 hearts.
This East should revalue her hand - 4 card fit for partner and lots of niceties for partner. Perhaps bid 3 not 3NT?
My tip to you: Whilst a 1 opening is a catch-all bid, a jump rebid of the club suit shows a very good suit and 15 - 18 points. Now, as East, revalue your hand and take an aggressive stance in your search for a possible slam.