Place for putting last bits of rather sensitive inside information (5)
I believe the answer is:
green
'place for putting' is the definition.
(I've seen this in another clue)
'last bits of rather sensitive inside information' is the wordplay.
'last bits of' indicates one should take the final letters.
'inside' means one lot of letters goes inside another.
'information' becomes 'gen' (gen can informally mean information).
The final letters of 'rather sensitive' are 're'.
're' put inside 'gen' is 'GREEN'.
(Other definitions for green that I've seen before include "Genre (anag.)" , "Proverbial constituent of our moon" , "personification of envy" , "Unripe; environmentalist" , "Flourishing" .)