Boost when single laptop is included in turn over (6)
I believe the answer is:
fillip
'boost' is the definition.
(I've seen this before)
'single laptop is included in turn over' is the wordplay.
'single' becomes 'I' (one).
'laptop' becomes 'l' (top of the word 'lap').
'is included in' is an insertion indicator.
'turn over' becomes 'flip' (synonyms).
'i'+'l'='il'
'il' going into 'flip' is 'FILLIP'.
'when' is the link.
(Other definitions for fillip that I've seen before include "Incitement" , "give encouragement" , "Spur - incentive" , "As tonic" , "Sharp stimulus or flick of a finger" .)