Crossword Genius

Back company involved in project (6)

Ross

I believe the answer is:

second

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'back' is the definition.
(synonyms)

'company involved in project' is the wordplay.
'company' becomes 'co' (abbreviation).
'involved' is an insertion indicator.
'in project' becomes 'send' (I can't explain this - if you can you should believe this answer much more).
'co' inserted inside 'send' is 'SECOND'.

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(Other definitions for second that I've seen before include "Small fraction of a day" , "Short time - back" , "Flash" , "Moment; musical interval" , "Lower < back" .)

I've seen this clue in The Guardian.
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