16 down: Twice your old yacht regulars crowed about being stranded? (4-4)
Here, twice your old yacht regulars = twice ye ah = yeah-yeah = crowed about being stranded.
The direct clue is too oblique for my tastes (and the answer not funny enough for that to be excused), but more problematically the ye has been misused.
Ye is a subject pronoun for the second-person plural, the Middle English equivalent of yous or you all in contemporary times, and definitely not a possessive pronoun, which your in modern day English is.
(And the ye in ye olde expressions is also not a standard feature of ye olde English, but it is quite a strange grammatical element that is not equivalent to an article, like the for instance. Instead, it seems to act merely as a marker that harks back to ye olde days).
Anyway, another spotting has been made of that most fugitive of creatures, a DA error.