You can try Audacity’s Click Removal effect - see this page in the Manual: http://manual.audacityteam.org/o/man/click_removal.html
This section of a suggested workflow for LP digitization also has useful tips: http://manual.audacityteam.org/o/man/sample_workflow_for_lp_digitization.html#clicks
Really stubborn clicks can be got at using this tutorial: http://manual.audacityteam.org/o/man/click_removal_using_the_spectrogram_view.html
My personal favourite tool is Brian Davies’ Click Repair - it costs a little (you do get a 14-day free trial) but if you have a lot of LPs and a lot of clicks (as I did) it’s well worth it, producing almost magical results. See this sticky thread: https://forum.audacityteam.org/t/click-pop-removal-clickrepair-software/1933/1
WC