Being a student can get Carlos badly out of breath! (7)
I believe the answer is:
scholar
'being a student' is the definition.
(I've seen this before)
'carlos badly out of breath' is the wordplay.
'badly' indicates an anagram.
'out of' indicates putting letters inside (some letters on the outside of others).
'breath' becomes 'h' (I can't justify this - if you can you should believe this answer much more).
'carlos' anagrammed gives 'scolar'.
'scolar' going around 'h' is 'SCHOLAR'.
'can get' acts as a link.
Can you help me to learn more?
(Other definitions for scholar that I've seen before include "Learned type" , "Academic, schoolboy" , "Distinguished academic" , "university type?" , "Person of learning" .)