Bad-tempered Texan leads pig home (5)

I believe the answer is:

testy

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'bad-tempered' is the definition.
(I've seen this in another clue)

'texan leads pig home' is the wordplay.
'texan leads' becomes 'te' (I can't justify this - if you can you should give a lot more credence to this answer).
'pig home' becomes 'sty' (I've seen this in another clue).
'te'+'sty'='TESTY'

Can you help me to learn more?

(Other definitions for testy that I've seen before include "Bad-tempered" , "Grumpy" , "likely to flare up?" , "Irritably impatient" , "Easily irritated" .)

I've seen this clue in The Daily Express.

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