Lift small alien bug (5)
I believe the answer is:
upset
'bug' is the definition.
(I've seen this before)
'lift small alien' is the wordplay.
'lift small' becomes 'ups' (I can't explain this - if you can you should believe this answer much more).
'alien' becomes 'et' (extraterrestrial).
'ups'+'et'='UPSET'
Can you help me to learn more?
(Other definitions for upset that I've seen before include "Disconcerted, discomposed" , "Overturn; unhappy" , "Caused grief" , "Disturb or knock over" , "Shock result!" .)