Have some construction workers entered the wrong way? (3)
I believe the answer is:
own
'have' is the definition.
(to have something is to own it)
'some construction workers entered the wrong way?' is the wordplay.
'some' says the answer is hidden in the clue (some parts of the word are used).
'the wrong way?' says the letters should be written backwards (I've seen 'the wrong way' mean this).
'nwo' is hidden within 'construction workers entered'.
'nwo' written backwards gives 'OWN'.
(Other definitions for own that I've seen before include "Acknowledge" , "Be in legal possession of (3)" , "Posses" , "Personal; possess" , "Keep" .)