Encountered holding a big corrupted unit of data (7)
I believe the answer is:
megabit
'unit of data' is the definition.
The definition suggests a singular noun which matches the answer.
'encountered holding a big corrupted' is the wordplay.
'encountered' becomes 'met' ('meet' can be a synonym of 'encounter').
'holding' is an insertion indicator.
'corrupted' indicates an anagram.
'a'+'big'='abig'
'abig' anagrammed gives 'gabi'.
'met' placed around 'gabi' is 'MEGABIT'.
Can you help me to learn more?
(Other definitions for megabit that I've seen before include "a lot of information needed" , "Amount of data used by computer" , "computing unit" , "Unit of data size" .)