Not informed a French space cheered up (13)
I believe the answer is:
unenlightened
'not informed' is the definition.
The answer and definition are not the same part of speech. However, adjectives and past participle verbs occasionally mean the same thing.
'a french space cheered up' is the wordplay.
'a french' becomes 'un' ('a' in French).
'space' becomes 'en' (in printing, a space as wide as a letter 'n').
'cheered up' becomes 'lightened' (lightening is a kind of cheering up).
'un'+'en'+'lightened'='UNENLIGHTENED'
Can you help me to learn more?
(Other definitions for unenlightened that I've seen before include "Without spiritual insight" , "Not uplifted by knowledge or religion" , "Not given spiritual insight" , "Ignorant" .)