Enter four or six in test? Of little importance (7)
I believe the answer is:
trivial
'of little importance' is the definition.
(I've seen this before)
'enter four or six in test?' is the wordplay.
I cannot quite understand how this works, but
'four' could be 'iv' (Roman numerals) and 'iv' is located in the answer.
'test?' could be 'trial' ('trial' can be a synonym of 'test') and 'trial' is located in the remaining letters.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for trivial that I've seen before include "Very easy" , "Of little importance" , "Of little value" , "Meaningless" , "Rinky-dink" .)