He's back in time to catch it (5)
I believe the answer is:
artie
'he's' is the definition.
'back in time to catch it' is the wordplay.
'back' says the letters should be written in reverse.
'in time' becomes 'era' (an era is a period of time. I am not sure about the 'in' bit.).
'to catch' indicates putting letters inside.
'era' placed around 'it' is 'eitra'.
'eitra' back-to-front is 'ARTIE'.
Can you help me to learn more?
(Other definitions for artie that I've seen before include "Guy" , "- Shaw, US jazz clarinettist and bandleader" , "Man" , "-- Shaw, jazz musician" , "Shaw, perhaps?" .)