To shield at home, you texted boring schedule (8)
I believe the answer is:
insulate
'to shield' is the definition.
(thesaurus)
'home you texted boring schedule' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'you texted' becomes 'U' (text abbreviation for 'you').
'boring' indicates putting letters inside (some letters must 'bore' a hole into other letters).
'schedule' becomes 'slate' (as in a film slated for release).
'u' put within 'slate' is 'sulate'.
'in'+'sulate'='INSULATE'
'at' is the link.
(Other definitions for insulate that I've seen before include "Lag" , "Thermally protect" , "Cocoon" , "Cover something to prevent loss of heat" , "Cover with material to prevent loss of heat" .)