dtgk

[devadiva]

12d informal early 20th century expression for something or someone wonderful (alt sp) 11
l???p?l?o?a.
11d type of fish similar to herring (7) a?e?i?e
25a the figurer of which a given number is the exponent required to produce a given number (7) a?t?l??

[Chiefpanda]

11d alewife
25a antilog
I'm waiting for 12d myself. Still googling

[bricro]

The third letter should be L (see Tical 15 across)) if that helps!!
I can't fathom it either. Jumble can't as well!.

[paulineward]

12d Lolapaloooza
11d Alewife
25a Antilog

[goldenfield]

lallapalooza, lalapalooza or lollapalooza ()
n something excellent or wonderful.
[Ety unknown]

[devadiva]

Lolapalooza !! What a wonderful word - thanks Pauline - hope the other two in waiting have picked it up as well.
Any idea what 6d and 44 across are?

[paulineward]

6d Induced drag
44a Insrutable?...is what I have

[devadiva]

Thanks again Pauline - think you mean inscrutable

[paulineward]

yes...sorry missed the c out!

[permaheat]

6d: induced drag
44a: inscrutable

[permaheat]

12d Lolapalooza. The more usual spelling is Lollapalooza. But it's very difficult to find the original meaning in any search engine - you usually get to a travelling festival of that name.