Competition, true, developed item of IT (8)
I believe the answer is:
computer
'item of it' is the definition.
I can't tell whether this defines the answer.
'competition true developed' is the wordplay.
'competition' becomes 'comp' (I've seen this in other clues).
'developed' indicates anagramming the letters.
'true' anagrammed gives 'uter'.
'comp'+'uter'='COMPUTER'
Can you help me to learn more?
(Other definitions for computer that I've seen before include "Electronic calculator" , "Eg, PC" , "Comer put out by data processing machine" , "Programmable machine" , "Curt poem about electronic machine" .)