Insensitive, albeit not as much following start of talks (11)
I believe the answer is:
thoughtless
'insensitive' is the definition.
(I've seen this before)
'albeit not as much following start of talks' is the wordplay.
'albeit' becomes 'though'.
'not as much' becomes 'less' ('less' can be similar in meaning to 'not as much').
'following' says to put letters next to each other.
'start of' says to take the initial letters.
The initial letter of 'talks' is 't'.
'less' put after 't' is 'tless'.
'though'+'tless'='THOUGHTLESS'
(Other definitions for thoughtless that I've seen before include "Showing little consideration for others" , "Inconsiderate - reckless" , "Lacking consideration" , "Uncaring" , "Insensitive" .)