Saturday Times Jumbo Cryptic 1339

[porilo]

Can anyone help with my last one please?

44a: Got down without delay, oddly finding nothing (6-5)

I have D?D?L?S?U?T and am totally stumped. I've checked and double-checked all my crossing answers and everything else seems to fit.

[dannyk13]

Diddly-squat

[dannyk13]

d(e)l(a)y inside did squat(got down)

[porilo]

Thanks very much. No wonder I didn't get it. I have never heard of such a word !!