Just a few of my observations,

There are only 103K results for clubbing outfits but there are 667K for clubwear

You are only PR 2 where as most of the top google searches for clubwear are around 4 & 5.

Across the 5 major SE's your only showing 214 IBL's (obviously different tools report diff number but not that differently)

Your site was registered early 2004.

I would take a guess at your site isn't mature enough to rate. I would have thought you need more than PR2 and 214 IBL's to rate decently on 667K results.

Also if you registered early 2004 and google didn't pick you up until post March you could be firmly in the sandbox.

Am not sure about this all, just some casual observations. I would say you need more IBL's using clubwear as an anchor text plus if you are sandboxed you should improve in time. Why it rates ok in MSN etc for the same keyword then I am stuck as well but thats all I can think of.