Scatter carelessly, it's true (5)
I believe the answer is:
strew
'scatter' is the definition.
(I've seen this before)
'carelessly it's true' is the wordplay.
'carelessly' is an anagram indicator.
'true' becomes 'rew' (I can't explain this - if you can you should give a lot more credence to this answer).
'ts' anagrammed gives 'st'.
'st'+'rew'='STREW'
Can you help me to learn more?
(Other definitions for strew that I've seen before include "Scatter loosely" , "Sprinkle" , "Scatter, spread around" , "Scatter untidily" .)