Peers to see laser design (5)
I believe the answer is:
earls
'peers' is the definition.
(I know this)
'laser design' is the wordplay.
'design' is an anagram indicator.
'laser' anagrammed gives 'EARLS'.
'to see' is the link.
(Other definitions for earls that I've seen before include "Laser the British peers" , "Lear's out for the flight of the nobility" , "They're below marquess and above viscount" , "counts" , "members of the House of Lords" .)