Dress software, terribly real (7)
I believe the answer is:
apparel
'dress' is the definition.
(synonyms)
'software terribly real' is the wordplay.
'software' becomes 'app' (software application).
'terribly' is an anagram indicator.
'real' is an anagram of 'arel'.
'app'+'arel'='APPAREL'
(Other definitions for apparel that I've seen before include "it's generally put on!" , "whatever people have on" , "Garb, clothes" , "Formal word for clothing" , "Pod of peas" .)