Slender but strong (4)
I believe the answer is:
wiry
(Other definitions for wiry that I've seen before include "Lean, tough, sinewy" , "Strong and flexible" , "Slender but strong and agile" , "with coarse hair" , "strong and slim" .)
I believe the answer is:
wiry
(Other definitions for wiry that I've seen before include "Lean, tough, sinewy" , "Strong and flexible" , "Slender but strong and agile" , "with coarse hair" , "strong and slim" .)