Turn inside out, always on time (5)
I believe the answer is:
evert
'turn inside out' is the definition.
(I've seen this in another clue)
'always on time' is the wordplay.
'always' becomes 'ever' (synonyms).
'on' is a charade indicator (letters next to each other) (in a down clue, letters appear on others).
'time' becomes 't' (abbreviation).
'ever'+'t'='EVERT'
(Other definitions for evert that I've seen before include "Turn aside or outwards" , "Chris --, female tennis star" , "Former US World No 1 tennis player, b. 1954" , "Turn inside out (biol.)" , "Tennis champion" .)