Times invested in electronic skill from the East particularly (5)
I believe the answer is:
extra
'particularly' is the definition.
(synonyms)
'times invested in electronic skill from the east' is the wordplay.
'times' becomes 'x' (2 times 4 is 2 x 4).
'invested in' means one lot of letters goes inside another.
'electronic' becomes 'e' (as in e-mail or e-books).
'skill' becomes 'art' (both can mean a talent).
'from the east' shows that the letters should be reversed in order (on a map from right to left).
'art' backwards is 'tra'.
'e'+'tra'='etra'
'x' placed inside 'etra' is 'EXTRA'.
(Other definitions for extra that I've seen before include "late edition" , "particularly" , "Bit-part actor" , "unused" , "One playing a minor part" .)