CONFORMANCE
My grandad was doing the same crossword!
caiman
colic
civic
sadisticsarcasticsardonicsatanicscenicscientificshellacsimplisticseismographicskepticsociopathicsporadicsoporificspasticspecificstoicstaticsumacsystematicsyllabicsymbolicsymphonicsystemic
caloriccausticceramicclassiccoloniccryptic
Alec
Cyan and Crimson.
Five letter words starting with C and ending with X are calyx and codex.
stoic
bucolic
havoc
A four letter word beginning with C and ending with X is crux.