At home, intensity is comprehensive (2,5)
I believe the answer is:
in depth
'comprehensive' is the definition.
(I've seen this before)
'at home intensity' is the wordplay.
'at home' becomes 'in' ('I'm in' can mean 'I'm at home').
'intensity' becomes 'depth' (I've seen this before).
'in'+'depth'='IN-DEPTH'
'is' acts as a link.
(Other definitions for in depth that I've seen before include "Thorough" , "Detailed sort of investigation" , "Profoundly" , "Thoroughly and comprehensively" , "comprehensive" .)