Turn out always on time (5)
I believe the answer is:
evert
'turn out' is the definition.
(I've seen this before)
'always on time' is the wordplay.
'always' becomes 'ever' (synonyms).
'on' means one lot of letters go next to another.
'time' becomes 't' (abbreviation).
'ever'+'t'='EVERT'
(Other definitions for evert that I've seen before include "Hitter of 6 [TENNIS BALL]" , "Turn aside or outwards" , "arrange to have the wrong side out?" , "Turn inside out (biol.)" , "Former US World No 1 tennis player, b. 1954" .)