I would double, planning to convert 2
♣ to 2
♦. I do not play ELC, but in balance seat, a single suited good hand (say 13-16 hcp with a 6 card suit) is shown (for me) by a jump overcall: this is a standard treatment, and is different from direct seat bidding.
So double followed by 2
♦ cannot be the same hand.
I agree that this sequence shows a (slightly) stronger hand: Axx KQxx KQJxx x would be fewer hcp but a better hand, and I'd be comfortable with the sequence on that hand.
I'd rather slightly overbid, via double and correct, than make the perhaps technically correct bid of 2
♦ because of the 4 card
♥ suit. While partner should probably bid 2
♥ with the actual hand (I say probably because I cannot be objective, knowing the hands), he wouldn't/shouldn't with 3=4=1=5.
Besides, partner doesn't ALWAYS make the bid you dread
So the 'flexible' (the expert buzzword strikes again) double seems to be a good choice.
'one of the great markers of the advance of human kindness is the howls you will hear from the Men of God' Johann Hari
LHO deals and opens 1♠ followed by 2 passes