Do they help one see the details? (5)
I believe the answer is:
specs
This clue is a double definition.
'do they help one see' is the first definition.
(short for spectacles)
'the details?' is the second definition.
(short for specifications)
(Other definitions for specs that I've seen before include "Detailed plan" , "Glasses (abbrev.)" , "Glasses (colloq.)" , "Glasses (informal)" , "what builders are doing?" .)