Exceptionally, change Ernie’s software (6,6)

I believe the answer is:

search engine

'software' is the definition.

'exceptionally change ernie's' is the wordplay.
'exceptionally' indicates an anagram.
'change'+'ernies'='changeernies'
'changeernies' with letters rearranged gives 'SEARCH ENGINE'.

(Other definitions for search engine that I've seen before include "internet facility" , "Program for locating information" , "Online helper" , "Yahoo or Google. for example" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.