Being rushed, a number inaccurately read out (5)
I believe the answer is:
raced
'being rushed' is the definition.
(I've seen this in another clue)
'a number inaccurately read out' is the wordplay.
'a number' becomes 'c' (C is an example).
'inaccurately' indicates anagramming the letters.
'out' means one lot of letters goes inside another.
'read' anagrammed gives 'raed'.
'c' inserted inside 'raed' is 'RACED'.
(Other definitions for raced that I've seen before include "Went quickly round" , "Took part in speed contest" , "went at speed" , "Hurried" , "Travelled at speed" .)