Observe friend returning some computers (7)
I believe the answer is:
laptops
'some computers' is the definition.
(laptop is a kind of computer)
'observe friend returning' is the wordplay.
'observe' becomes 'spot' (I've seen this before).
'friend' becomes 'pal' (pal is a kind of friend).
'returning' says the letters should be written in reverse.
'spot'+'pal'='spotpal'
'spotpal' written backwards gives 'LAPTOPS'.
(Other definitions for laptops that I've seen before include "PCs" , "more than one PC" , "Portable computers" .)