** Northern Star Resources NST.AX slips 3.8% to A$19.15, lowest since April 9
** Stock among top pct losers on benchmark ASX200 index .AXJO
** Gold miner reports Q3 gold sales of 385koz vs year-ago 401koz
** Jefferies cuts PT to A$24 from A$25 as sales and production results miss estimates; retains "buy"
** Says this happened due to deferred grade profile at Kalgoorlie Consolidated Gold Mines in Western Australia
** Expects strong Q4 despite short-term issues, boosted by elevated grades and productivity from Golden Pike North and Oroya Brownhill projects
** NST up 8.5% in April
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com; X: @thatstanishk;))