It's not easy welcoming order in Government that amounts to regular savings (8)
I believe the answer is:
hoarding
'amounts to regular savings' is the definition.
I can't tell whether this definition defines the answer.
'it's not easy welcoming order in government' is the wordplay.
'it's not easy' becomes 'hard' ('hard' is the opposite to 'easy').
'welcoming' is an insertion indicator (in sense of 'inviting in').
'order' becomes 'o' (abbreviation e.g. in British honours OM, OBE etc.).
'government' becomes 'g'.
'hard' going around 'o' is 'hoard'.
'hoard'+'in'+'g'='HOARDING'
'that' acts as a link.
Can you help me to learn more?
(Other definitions for hoarding that I've seen before include "spot of publicity" , "Large outdoor signboard" , "Poster board" , "Amassing; advert carrier" , "Setting great store" .)