Is such a suit singularly suited to a hoyden? (6)
I believe the answer is:
romper
'is such a suit singularly' is the definition.
I can't tell whether this defines the answer.
'suited to a hoyden?' is the wordplay.
'suited' becomes 'er' (I can't explain this - if you can you should believe this answer much more).
'to' means one lot of letters go next to another (I've seen this in other clues).
'a hoyden?' becomes 'romp' ('romp' can be a synonym of 'hoyden').
'er' put after 'romp' is 'ROMPER'.
Can you help me to learn more?
(Other definitions for romper that I've seen before include "Young child's one-piece outer garment" , "Child's onesie" .)