In Amsterdam, seldom finding young woman (6)
I believe the answer is:
damsel
'young woman' is the definition.
(damsel is a kind of young woman)
'in amsterdam seldom finding' is the wordplay.
'in' indicates a hidden word.
'DAMSEL' is hidden within 'amsterdam seldom finding'.
(Other definitions for damsel that I've seen before include "Young girl" , "Girl (literary)" , "Young lady of old, perhaps in distress" , "(Poetically) a young unmarried woman" , "Someone in distress?" .)