Look smaller though unique (8)
I believe the answer is:
peerless
'unique' is the definition.
(I've seen this before)
'look smaller' is the wordplay.
'look' becomes 'peer' (peering is a kind of looking**).
'smaller' becomes 'less'.
'peer'+'less'='PEERLESS'
'though' is the link.
(Other definitions for peerless that I've seen before include "No Iolanthe performance could be so" , "Having no equals" , "Unequalled" , "Outstanding" , "superb" .)