I am quick to get uniform that's not prepared (9)
I believe the answer is:
impromptu
'not prepared' is the definition.
The answer and definition are not the same part of speech. However, past participle verbs and adjectives occasionally define each other.
'i am quick to get uniform' is the wordplay.
'i am' becomes 'I'm' (contraction).
'quick' becomes 'prompt' (synonyms).
'to get' says to put letters next to each other.
'uniform' becomes 'U' (phonetic alphabet: alpha, bravo, charlie etc.).
'im'+'prompt'+'u'='IMPROMPTU'
'that's' acts as a link.
Can you help me to learn more?
(Other definitions for impromptu that I've seen before include "Without rehearsal or preparation" , "Unprepared" , "Improvised" , "Unplanned; instrumental piece" , "Spontaneously, off the cuff" .)