Though ruined, you still get some bus tickets (4)
I believe the answer is:
bust
'though ruined' is the definition.
'bust' can be an answer for 'ruined' (I've seen this before). I am not sure about the 'though' bit.
'you still get some bus tickets' is the wordplay.
'you' becomes 'u' (commonly used in online communication).
'still' becomes 's' (this might be a standard abbreviation I've not previously seen).
'get' means one lot of letters goes inside another.
'some' indicates taking the first letters.
The first letters of 'bus tickets' is 'bt'.
'u'+'s'='us'
'us' going into 'bt' is 'BUST'.
Can you help me to learn more?
(Other definitions for bust that I've seen before include "Houdon's Voltaire" , "Broken - chest" , "Portrait - broken" , "Small statue" , "Bankrupt; police raid" .)