Crossword Genius

We lack RE, and long desperately for it! (6,9)

Ross

I believe the answer is:

carnal knowledge

'it' is the definition.
(both are euphemisms for sex)

'we lack re and long desperately' is the wordplay.
'desperately' is an anagram indicator.
'we'+'lack'+'re'+'and'+'long'='welackreandlong'
'welackreandlong' is an anagram of 'CARNAL KNOWLEDGE'.

'for' is the link.

(Another definition for carnal knowledge that I've seen is " It".)

I've seen this clue in The Independent.
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