Regularly avoided coast's air or she would get kind of cold (7)
I believe the answer is:
catarrh
'kind of cold' is the definition.
'regularly avoided coast's air or she' is the wordplay.
'regularly avoided' indicates alternate letters.
'coasts'+'air'+'or'+'she'='coastsairorshe'
The alternating letters of 'coastsairorshe' are 'CATARRH'.
'would get' acts as a link.
(Other definitions for catarrh that I've seen before include "Inflammation of membrane of nose and throat" , "Arch rat with inflamed mucous membrane" , "Arch rat with inflammation of mucous membrane" , "Nasal problem" , "cold symptom" .)