IT expert breaking the ice (6)
I believe the answer is:
techie
'it expert' is the definition.
(short for technician)
'breaking the ice' is the wordplay.
'breaking' is an anagram indicator.
'the'+'ice'='theice'
'theice' anagrammed gives 'TECHIE'.
(Other definitions for techie that I've seen before include "computer expert" , "PC expert" , "Expert in some practical science" , "IT whizz" .)