Looks round at exceptional legs? (5)
I believe the answer is:
ogles
'looks' is the definition.
(ogling is a kind of looking)
'round at exceptional legs?' is the wordplay.
'round' becomes 'o' (round can mean a round object).
'at' says to put letters next to each other.
'exceptional' indicates an anagram (an unusual or exceptional ordering of the letters).
'legs' with letters rearranged gives 'gles'.
'o'+'gles'='OGLES'
(Other definitions for ogles that I've seen before include "Casts amorous glances" , "Looks longingly at" , "Leers" , "Looks at (someone) lecherously" , "Looks at amorously, makes eyes at" .)