Stiffly proper (4)
'stiffly proper' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for prim that I've seen before include "Old-maidish" , "Prudish, formal" , "Prudishly disapproving" , "Affectedly formal" , "Proper (type of rose?)" .)
'stiffly proper' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for staid that I've seen before include "Unadventurous, dull" , "Sedate, decorous" , "Very conventional and dull" , "Sedate and serious" , "Sober, grave" .)