England insignificant in past (7)

I believe the answer is:

blighty

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'england' is the definition.
(Blighty is an example)

'insignificant in past' is the wordplay.
'insignificant' becomes 'light' (I can't justify this - if you can you should believe this answer much more).
'in' is an insertion indicator.
'past' becomes 'by' ('by' can be a synonym of 'past').
'light' put into 'by' is 'BLIGHTY'.

Can you help me to learn more?

(Other definitions for blighty that I've seen before include "Home Country"" , "England (sl.)" , "British soldiers' homeland" , "Disease-ridden" , "Britain (slang)" .)

I've seen this clue in The Guardian.

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