Enigmatic Variations 1390

[Neveracrossword]

Old undesirable suitor's tired, broke and ridiculous in common parlance (11)
D???????????
Sorry for having only one letter, but this is a jigsaw-type puzzle. I've spent ages on this one clue.

[Toorak]

detrimental

Anagram of tired & mental (ridiculous in common parlance)

https://www.etymonline.com/word/detrimental

[Neveracrossword]

Thanks, Toorak. I thought there was an anagram involved, and thought it'd involve 'tired', but I couldn't think of a 'ridiculous' word.

[x_word_fan]

So where is the other clue with 11 letters available?

[Neveracrossword]

x-word-fan, I think thematic stuff might be involved but that's as far as I've got.

[ProfessorMaisie]

The other 11 letter down entry remains blank - bar the first letters of the last two across entries - until filled in by the thematic material.

[x_word_fan]

thanks!