Pieceword

With the help of the Across clues only, can you fit the 25 pieces into their correct positions in the empty grid (which, when completed, will exhibit a symmetrical pattern)?

ACROSS 1 Aspect, element • Narrow Viking sailing vessel 3 Library storage surface • Hospital employee 5 Lassitude • Most baggy 7 Parent’s brother • Think deeply

9 Organ of pregnancy • Soft buttery confection 11 Inflicted (revenge) • Different form of an atom of the same element

13 Prize, decoration • Tobacco rolled in paper

15 Make impossible • Skilful