If partner visa application is over eight months with a 600-visa pending decision, they process the partner visa, and if this happens, you will need to withdraw the visitor application once partner visa grant is confirmed.
Considering you have submitted the polio vaccination cert. and all the required documentation completed already you’ll get the 600- visa grant soon.
For partner visa, if police clearance is 6months old they’ll ask you to resubmit along with any other missing docs(like form80, form888 -2 statutory statement from Pakistan), usually by contacting after 7-8 months from the application date. (generally, 14-28 days to submit the new docs).