Still less than seventeen (4)
'still' is the definition.
(synonyms)
'less than seventeen' is the wordplay.
'less' indicates the answer is hidden within the clue (the clue less some of the letters in it).
'EVEN' is hidden in the letters of 'than seventeen'.
(Other definitions for even that I've seen before include "Like 2, 4 or 6, say" , "Peaceful" , "Commensurate" , "Placid - not easily angered" , "Like half the numbers" .)
'still less' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'seventeen' is the wordplay.
'EEN' is hidden within the letters.
However, I'm unsure how this is indicated.
'than' acts as a link.
Can you help me to learn more?
(Other definitions for een that I've seen before include "Literary form of even" , "Even to the poet" , "Poetic form of even" , "Even, poetically" .)