Call about organised run during the day (7)
I believe the answer is:
diurnal
'during the day' is the definition.
(I've seen this before)
'call about organised run' is the wordplay.
'call' becomes 'dial' (both can mean to telephone).
'about' indicates putting letters inside.
'organised' indicates anagramming the letters.
'run' with letters rearranged gives 'urn'.
'dial' placed around 'urn' is 'DIURNAL'.
(Other definitions for diurnal that I've seen before include "in daylight" , "Occurring daily" , "Circadian" , "Of the day, not the night" , "every day" .)