Change ends in bar, therefore (4)
I believe the answer is:
thus
'therefore' is the definition.
(synonyms)
'change ends in bar' is the wordplay.
I cannot really understand how this works, but
'bar' could be 't' (T-bar is a part of a ski lift) and 't' is found in the answer.
The remaining letters 'hus' 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 thus that I've seen before include "Like so" , "It follows" , "an original Christmas gift" , "Shut (anag.)" , "Therefore, hence" .)