Turkish sides should start to share ideas (8)
I believe the answer is:
thoughts
'ideas' is the definition.
('thought' can be a synonym of 'idea')
'turkish sides should start to share' is the wordplay.
'sides' suggests removing the centre (only the letters on the sides are used).
'should' becomes 'ought' (synonyms).
'start to' suggests taking the first letters.
'turkish' with its middle taken out is 'th'.
The initial letter of 'share' is 's'.
'th'+'ought'+'s'='THOUGHTS'
(Other definitions for thoughts that I've seen before include "Ideas, musings" , "Ideas and opinions (8)" , "Cogitations" , "Ideas, reflections" , "Notions" .)