1a dish with meat and seafood served together S?R?/N/?U?F 15d flowering plant pondweed family E?L????K 20d Of a larval stage in certain decapod crustaceans 6 Z??E?L 22a person of superlative quality S?A?H???? thanks have googled for ages!
I think it probably was more difficult today, with a number of answers being somewhat obscure or variants of the standard. This puzzle is always enjoyable though, as it does stretch the old grey cells somewhat ! ;0)