Irrational fears about trouble starting, come later (6)
I believe the answer is:
afters
'come later' is the definition.
I can't tell whether this definition defines the answer.
'irrational fears about trouble starting' is the wordplay.
'irrational' is an anagram indicator.
'about' indicates putting letters inside.
'starting' indicates taking the first letters.
The initial letter of 'trouble' is 't'.
'fears' with letters rearranged gives 'afers'.
'afers' going around 't' is 'AFTERS'.
Can you help me to learn more?
(Other definitions for afters that I've seen before include "Pud" , "Dessert (colloq.)" , "Sweet course" , "food for pudding" , "Tiramisu, possibly" .)