Some shorter miniskirts, the ends of lines (7)
I believe the answer is:
termini
'ends of lines' is the definition.
(I've seen this before)
'some shorter miniskirts the' is the wordplay.
'some' indicates a hidden word (some parts of the word are used).
'TERMINI' is hidden within 'shorter miniskirts the'.
(Other definitions for termini that I've seen before include "End points of rail or bus routes" , "End-points" , "Ends, extremities" , "Finishing points" , "ends of lines" .)