13a Scientists studying flora and fauna, of artic perhaps, smash inuit shelters in bits ???L?????S
18a With spluttering outboard, are you sounding like singer/songwriter on tour ????B?D???
21d Des leaves old africa explorer to go about in search of local fauna ??I?O
Hi triconal, yes I knew it was only (5) but was wondering if, from the two answers already given, it put any more known letters into your layout; that's all.