I've written about this in comments on LARadio.com and Reelradio.com. The real key is that Clear Channel's proposal removes the 5 FM/3AM cap. If approved, they'd be able to own 12 of any...AM or FM.
I think it's a safe bet that they won't choose more AM...and this paves the way for them to get out of AM entirely.
This week, CC donated some AMs to the Minority Media Telecom Council, which facilitates getting them licensed by minority broadcasters. CC gets a nice tax write-off for the donation.
IF (again, IF) CC wanted to own nothing but FMs in Los Angeles, they could do it. One scenario:
* Donate KLAC, KFI and KTLK to the MMTC, which finds 3 minority owners.
* Buy CBS/LA, adding KCBS, KTWV, KAMP, KRTH and KROQ to the CC/LA cluster. They would now have 10 FMs.
* Donate KNX and KFWB to the MMTC, which finds 2 more minority owners.
* Buy Citadel/LA, adding KLOS to the CC/LA cluster. Now 11 FMs.
* Donate KSPN and KABC to the MMTC, which finds 2 more minority owners.
* Buy Emmis' stand-alone KPWR, and now the CC/LA cluster is 12 FMs.
Clear Channel removes three competitors, but can argue that their move has brought 7 new minority owners into the market...a net gain of four owners and thus a victory for diversity.
What would they do with 7 more FMs? That's pure speculation, but KFI's talk format would have to go on one of them, KLAC and/or KSPN's sports format on one (or two), KNX's all-news might take another, and it's possible that both KTLK's liberal talk and KFWB's syndicated talk could do better on FM than they do on AM. If you make the same argument for KABC's talk format, then there's your 7.
What's left in commercial English-language FMs with a full-market signal? KSWD and KKGO.
Now, that's just one scenario...CC might want to consider (especially in L.A.) being in Spanish-language formats. So the target stations could be different. But the above would give them a stranglehold on English-language FM.