Look at Lego reconstructed (4)
I believe the answer is:
ogle
'look at' is the definition.
(I've seen this in another clue)
'lego reconstructed' is the wordplay.
'reconstructed' indicates anagramming the letters.
'lego' anagrammed gives 'OGLE'.
(Other definitions for ogle that I've seen before include "Look at with amorous intentions" , "Cast amorous glances" , "Cast flirtatious glance at" , "Amorous stare" , "Look flirtatiously at" .)