** Department store group Debenhams' shares down 5pct, bottom of the FTSE mid-250 index, after saying Q3like-for-like sales fall 0.2 pct vs a 1.1 pct rise in H1
** Trading conditions have become more uncertain,particularly in clothing, co says
** Liberum expects the shares to underperform the sector onthese numbers, places FY estimates under review
** A third of co's 30-day avg vols gone through in the firstten minutes of trade
** Worst day for shares in 7 mths, bottom of the FTSE 350General Retailers Index (venkateshasoumithri.mamidipudi.thomsonreuters.com@reuters.net)