Detailed talk behind electronic laboratory (9)
I believe the answer is:
elaborate
'detailed' is the definition.
(synonyms)
'talk behind electronic laboratory' is the wordplay.
'talk' becomes 'orate' (orating is a kind of talking).
'behind' says to put letters next to each other.
'electronic' becomes 'e' (as in e-mail or e-books).
'laboratory' becomes 'lab' (synonyms).
'e'+'lab'='elab'
'orate' put after 'elab' is 'ELABORATE'.
(Other definitions for elaborate that I've seen before include "flesh out?" , "Present in further detail" , "Extravagant" , "Very ornate or complex" , "Polish" .)