Retirement cover void? Racketeers essentially! (7)

I believe the answer is:

blanket

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'retirement cover' is the definition.
'blanket' can be an answer for 'cover' (blanket is a kind of cover). I'm unsure of the 'retirement' bit.

'void? racketeers essentially' is the wordplay.
'void?' becomes 'blank' (I've seen this before).
'essentially' indicates the central letters.
The middle of 'racketeers' is 'et'.
'blank'+'et'='BLANKET'

Can you help me to learn more?

(Other definitions for blanket that I've seen before include "General" , "Spread over as with bedclothes" , "Bed cover; inclusive" , "Covering (on bed)" , "Woollen bed cover" .)

I've seen this clue in The Sunday Times and The Times.

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