Deduce that it's the second time nonstarter has upset umpire (5)
I believe the answer is:
infer
'deduce' is the definition.
(I know that deduce can be written as infer)
'it's the second time nonstarter has upset umpire' is the wordplay.
'it's the second time' becomes 'i' (2nd letter of 'time').
'nonstarter' becomes 'n' (this could be a standard abbreviation which I don't know about).
'has' says to put letters next to each other.
'upset' shows that the letters should be reversed in order.
'umpire' becomes 'ref' (short for referee).
'ref' written backwards gives 'fer'.
'i'+'n'+'fer'='INFER'
'that' acts as a link.
Can you help me to learn more?
(Other definitions for infer that I've seen before include "Work out" , "Presume" , "Deduce (from evidence)" , "Deduce, surmise" , "Deduce logically" .)