Scatter carelessly, it’s true (5)
I believe the answer is:
strew
'scatter' is the definition.
(thesaurus)
'carelessly it's true' is the wordplay.
'carelessly' is an anagram indicator.
'true' becomes 'rew' (I am not sure about this - if you are sure you should believe this answer much more).
'ts' is an anagram of '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" .)