row about single beast having extremely toxic poison (6) ?e???n lady harpist playing not quietly (6) ?a???a slav leisurely went round low lying ground(4) ?l?? significant say i have (10) ???r?????e
Think the first one may be Heroin ( Heron- for beast + single =i) Heroin is extremely poisnous, too. Not entirely sure, this is just an educated guess.
Ciao, Beatrice ;-)