Since that time, always behind (4,5)
I believe the answer is:
ever after
'since that time' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.
'always behind' is the wordplay.
'always' becomes 'ever' (synonyms).
'behind' becomes 'after' (I've seen this in another clue).
'ever'+'after'='EVER AFTER'
Can you help me to learn more?
(Other definitions for ever after that I've seen before include "from then on, till the end of time" , "for good?" .)