Snag caught in strange light (6)
I believe the answer is:
glitch
'snag' is the definition.
(I've seen this before)
'caught in strange light' is the wordplay.
'caught' becomes 'c' (cricket abbreviation).
'in' is an insertion indicator.
'strange' indicates an anagram.
'light' anagrammed gives 'glith'.
'c' going within 'glith' is 'GLITCH'.
(Other definitions for glitch that I've seen before include "Flaw" , "Unexpected failure or error" , "Brief failure" , "Temporary fault" , "Small fault preventing proper working" .)