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simplifying a resulted derivative expression


Hi, I have a function f[ux, uy, vx, vy, wx, wy, u, v, w, x, y]

I am doing different manipulations with this function and the results
I get have expressions like that:

Derivative[0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0][f][ux, uy, vx, vy, wx, wy,
u, v, w, x, y]

which is difficult to understand. The question is how can I substitute
automatically the above expression by: fu ?

(it means I need to see that the derivative is taken over the 7th
argument which is 'u' and write that f is derived with respect to u
which I want to be written as fu)

Can it be done?

Thanks a lot!


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