Crossword Genius

Greatly superior ways associated with a school principal (7,5)

Ross

I believe the answer is:

streets ahead

'greatly superior' is the definition.
(I've seen this before)

'ways associated with a school principal' is the wordplay.
'ways' becomes 'streets' (street is a kind of way**).
'associated with' means one lot of letters go next to another.
'school principal' becomes 'head' ('head' can be a synonym of 'school principal').
'streets'+'a'+'head'='STREETS AHEAD'

(Other definitions for streets ahead that I've seen before include "much better" , "vastly superior" , "immeasurably better" , "Greatly superior" , "Far superior" .)

I've seen this clue in The Telegraph.
Want a hint initially instead of a full solution? Install my app