Regular college entrance application? (7)
I believe the answer is:
uniform
'regular' is the definition.
(similar in meaning)
'college entrance application?' is the wordplay.
'college' becomes 'uni' (short for university).
'entrance application?' becomes 'form' (I can't justify this - if you can you should give a lot more credence to this answer).
'uni'+'form'='UNIFORM'
Can you help me to learn more?
(Other definitions for uniform that I've seen before include "Unvarying kind of costume" , "Official attire" , "Tunic; even" , "Official wear; unvarying" , "Regular - distinctive garb" .)