'Fish-eye' is the def (a way of looking) - the answer begins with '(len)S' + usual archaic (Shakesp.) 3 letters for 'set on' + usual abbrev for 'base'.
All done but not sure what abbreviation to put for the first 7 letters of 31 down - the abbreviation for a set of numbers? Can't seem to find anything definitive in Chambers. Thx