For example study love turning tense (2,4)
I believe the answer is:
on edge
'tense' is the definition.
(on edge can mean tense or stressed)
'for example study love turning' is the wordplay.
'for example' becomes 'e.g.' (short for 'exempli gratia', 'for example' in Latin).
'study' becomes 'den' (den can mean an office or study).
'love' becomes 'o' (love means zero in tennis).
'turning' says the letters should be written backwards.
'eg'+'den'+'o'='egdeno'
'egdeno' back-to-front is 'ON EDGE'.
(Other definitions for on edge that I've seen before include "Highly strung" , "Twitchy" , "Under stress" , "Nervy, tense and irritable" , "All agog" .)