Legwear selected, but no top (4)
I believe the answer is:
hose
'legwear' is the definition.
(I've seen this in another clue)
'selected but no top' is the wordplay.
'selected' becomes 'chose' ('choose' can be a synonym of 'select').
'but no top' means to remove the first letter (the letter at the top is removed).
'chose' with its initial letter removed is 'HOSE'.
(Other definitions for hose that I've seen before include "plumbing connection" , "Flexible pipe for liquid" , "Stockings; drench" , "One with doublet; a tube" , "Flexible tube for liquid" .)