Additional skill and energy reflected receiving kiss (5)
I believe the answer is:
extra
'additional' is the definition.
(extra means additional or surplus)
'energy reflected receiving kiss' is the wordplay.
'energy' becomes 'e' (physics symbol as in E=mcr).
'reflected' says the letters should be written in reverse (letters reflected back).
'receiving' becomes 'art' (I can't explain this - if you can you should give a lot more credence to this answer).
'kiss' becomes 'x' (X can represent a kiss).
'art'+'x'='artx'
'artx' reversed gives 'xtra'.
'e'+'xtra'='EXTRA'
'skill and' acts as a link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for extra that I've seen before include "Additional - bye" , "late edition" , "like one of the crowd" , "Bit-part actor" , "Actor in crowd scene, no lines" .)