150 these days are covered (4)
I believe the answer is:
clad
'are covered' is the definition.
(I've seen this before)
'150 these days' is the wordplay.
'150' becomes 'cl' (roman numerals).
'these days' becomes 'ad' (as in Anno Domini, after Christ).
'cl'+'ad'='CLAD'
(Other definitions for clad that I've seen before include "Invested" , "Cover with insulation" , "Clothed, covered" , "Attired" , "Decked" .)