Snow-white polar bear Eric and he almost shot (14)

'snow-white' is the definition.
Both the answer and definition are adjectives. Maybe there's an association between them I don't understand?

'polar bear eric and he almost shot' is the wordplay.
'and' is a charade indicator (letters next to each other).
'almost' means to remove the last letter (most of the word but not all of it).
'shot' indicates an anagram.
'he' with its last letter taken away is 'h'.
'polar'+'bear'+'eric'+'h'='polarbearerich'
'polarbearerich' is an anagram of 'IRREPROACHABLE'.

Can you help me to learn more?