In a modern setting short skirts may be suggestive (11)
I believe the answer is:
reminiscent
'be suggestive' is the definition.
(I've seen this before)
'in a modern setting short skirts' is the wordplay.
'in' means one lot of letters goes inside another.
'a modern setting' becomes 'recent' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'short skirts' becomes 'minis' (mini skirts).
'recent' enclosing 'minis' is 'REMINISCENT'.
'may' is the link.
Can you help me to learn more?
(Other definitions for reminiscent that I've seen before include "Bringing back" , "Like Proust, perhaps" , "Evocative" , "Suggestive - in ten crimes (anag)" , "Stirring memories" .)