Realise English National Curriculum has changed (6)
I believe the answer is:
encash
'realise' is the definition.
(I've seen this before)
'english national curriculum has changed' is the wordplay.
'english national curriculum' becomes 'enc' (this might be a standard abbreviation of which I'm unaware).
'changed' indicates anagramming the letters.
'has' anagrammed gives 'ash'.
'enc'+'ash'='ENCASH'
Can you help me to learn more?
(Other definitions for encash that I've seen before include "one can do this at the bank" , "Turn (cheque) to money" , "Change to different sort of dough" , "Realise" .)