There is no way you could make a sound effect like this with multiple overdubs and effects. Not compared to a great sound effect. I have got many sound effects libraries as I used to do a lot of audio post for TV mixing. One of my libraries is a Canadian library which is amazing. Anyway there is an affect of a very large crwod clapping in unison like waiting for a late act to come on etc..
.(recently Justin Bieber made a crowd wait 70 minutes before he came on. Rude IMO) Anyway this effect is pretty close to what you are after. But they are doing it faster than I imagine you want it but it would be easy to cut and fade these claps and put them in time with your music I am sure.
Just use say the first 7 or 9 and put them on beats 2 bnd 4 of your music in a round robin. It will be many bars before the same claps are in the same place. There are two versions of this. There is atmos in between the claps and on the track and if I were you I would also fill the gaps quietly with this atmos between your edited claps to make it sound even more real.
The second part of this track sounds like a smaller crowd but the claps are slower and easier to cut but not as grand as the first part which sounds like a very large crowd though.
If you PM me I can send you the wave file through You Send It. It is about 15 Meg in size. Or send me an email and I will make a decent MP3 of it and send it to you that way. It is a decent stereo image too.