Altogether enthusiastic about turnover (2,4)
I believe the answer is:
in toto
'altogether' is the definition.
(I've seen this in another clue)
'enthusiastic about turnover' is the wordplay.
I cannot quite see how this works, but
'enthusiastic' could be 'into' (I've seen this before) and 'into' is found within the answer.
The remaining letters 'to' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for in toto that I've seen before include "As a whole (Latin)" , "As a whole (Lat.)" , "overall" , "Tranquillity" , "Altogether, completely" .)