What do these letters stand for?

[Bearsden]

please could someone help with last three answers to a local quiz?
what do the following letters stand for?
T S Year 1
T L L A D (clue is funny plumbing)
W T R I T W (if BM remembers R!)
thanks for any help

[sara3]

no. 2 must be something.. laugh(ed) like a drain

[gyroman]

How about something like - To Laugh Like a Drain -?