With 6 points to a maximum 15 with no major (and likely 5 cards in clubs) I would probably have returned to clubs (probably 2, maybe 3) after hearing No Trumps. Partners one club was valid, as was hearts as a second suit (asked for and recieved) but their 1nt was based on the manufactured one spade. Daggers to dummy were well deserved. No offence intended.

TEd, I assume They missed their chance to bet due to the pre-emptive 1c-1d-1h-1s-1nt bidding of We.