Engineers cutting short visit about IT performance (7)
I believe the answer is:
recital
'performance' is the definition.
(recital is a kind of performance)
'engineers cutting short visit about it' is the wordplay.
'engineers' becomes 're' (Royal Engineers**).
'cutting' means to remove the last letter.
'short visit' becomes 'call' (I've seen this before).
'about' means one lot of letters goes inside another.
'call' with its last letter taken off is 'cal'.
'cal' going around 'it' is 'cital'.
're'+'cital'='RECITAL'
(Other definitions for recital that I've seen before include "Reading" , "Article found in performance" , "One's performance" , "Public performance by a solo musician" , "Musical entertainment or a long account" .)