Titan meant to change acquisition (10)
I believe the answer is:
attainment
'acquisition' is the definition.
(I know that acquisition can be written as attainment)
'titan meant to change' is the wordplay.
'to change' indicates an anagram.
'titan'+'meant'='titanmeant'
'titanmeant' anagrammed gives 'ATTAINMENT'.
(Other definitions for attainment that I've seen before include "The achievement (of a goal)" , "Feat achieved" , "Act of achieving something" , "Laudable exploit" , "Skill, achievement" .)