PSF can be used for deconvolution, however:
Make double triple sure that this is the actual PSF and not a random glimpse (atmospheric speckle/seeing comes to mind)
If it is a momentary PSF, then it can be used only for the image taken at the same time. e.g. if it is taken from a reference section in a larger frame, the the entire frame can be deconvolved, but no other frames.
Consider widening it. Good results appear when you know the PSF over a large area and with a wide dynamic range and low noise.