Tense work from Her Majesty after second long freeze (5-7)

I believe the answer is:

spine-chiller

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'tense work from her majesty' is the definition.
I can't judge whether this definition defines the answer.

'second long freeze' is the wordplay.
'second' becomes 's' (common abbreviation).
'long' becomes 'pine' ('pine' can be a synonym of 'long').
'freeze' becomes 'chiller' (I can't justify this - if you can you should give a lot more credence to this answer).
's'+'pine'+'chiller'='SPINE-CHILLER'

'after' is the link.

Can you help me to learn more?

(Other definitions for spine-chiller that I've seen before include "Terrifying story" , "Book arousing terror" , "Scary story" .)

I've seen this clue in The Telegraph.

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