Fitting to intern pet, somehow (9)
I believe the answer is:
pertinent
'fitting' is the definition.
(I've seen this before)
'intern pet somehow' is the wordplay.
'somehow' indicates an anagram.
'intern'+'pet'='internpet'
'internpet' is an anagram of 'PERTINENT'.
'to' is the link.
(Other definitions for pertinent that I've seen before include "Relevant, to the point" , "Relevent, material" , "Apposite" , "fitting" , "Appropriate" .)