1) Accurately 2) As deserved 3) Deservedly 4) Honestly 5) In a just manner 6) In an honorable manner 7) In conformity to fact or rule 8) In fairness 9) Justifiedly 10) Rightly 11) With good cause 12) With honesty 13) Without bias Found on https://www.crosswordclues.com/clue/justly
Just'ly adverb [ From Just , adjective ] In a just manner; in conformity to law, justice, or propriety; by right; honestly; fairly; accurately. 'In equal balance justly weighed.' Shak. « Nothing can justly be despised that can not justly Found on http://www.encyclo.co.uk/webster/J/18
in a just manner; honestly; fairly: Deal justly with the prisoners. · in conformity to fact or rule; accurately. · deservedly; as deserved. Found on https://www.infoplease.com/dictionary/justly