Get hard ideas changed or reject them? (3,5)
I believe the answer is:
set aside
'get' is the definition.
The answer and definition can be both related to change as well as being verbs in their base form.
Perhaps there's an association between them I don't understand?
'hard ideas changed or reject them?' is the wordplay.
I cannot quite understand how this works, but
'hard' could be 'set' (similar in meaning) and 'set' is located in the answer.
an anagram of 'ideas' is 'aside' which is within the answer.
No letters remain.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for set aside that I've seen before include "Reserve or put away" , "Fallow" , "The policy of taking land out of production to reduce crop surpluses" , "Reserve(d) in advance" , "Preserve" .)