Crossword Genius

Incorrectly fix neap tide cycle I'd abandoned for time we're likely to be here (4,10)

Ross

I believe the answer is:

life expectancy

I'm a little stuck... Click here to teach me more about this clue!

'time we're likely to be here' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'incorrectly fix neap tide cycle i'd abandoned' is the wordplay.
'incorrectly' is an anagram indicator (I've seen this in other clues).
'abandoned' indicates named letters should be taken away.
'fix'+'neap'+'tide'+'cycle'='fixneaptidecycle'
'fixneaptidecycle' with 'id' taken out is 'fixneaptecycle'.
'fixneaptecycle' is an anagram of 'LIFE-EXPECTANCY'.

'for' is the link.

Can you help me to learn more?

(Other definitions for life expectancy that I've seen before include "Actuarial estimate of our remaining years" , "One's predicted days" .)

I've seen this clue in The Telegraph.
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