
1) After upsilons 2) Athenian letters 3) Chi preceders 4) Frat letters 5) Fraternity letters 6) Greek characters 7) Greek consonants 8) Greek letters 9) Letters after upsilons 10) Letters from crete 11) Letters from Lemnos 12) Letters on ship 13) Some sorority letters 14) Sorority letters 15) They follow upsilons
Found on
https://www.crosswordclues.com/clue/phis

style=`background:#ADD8E6` Sample: Justice ...
Found on
http://en.wikipedia.org/wiki/PHIS

Public Health Institute of Scotland (now Health Scotland)
Found on
https://www.encyclo.co.uk/local/21231
No exact match found.