Turn aside from state capital in Texas (5)
I believe the answer is:
avert
'turn aside' is the definition.
(I've seen this in another clue)
'state capital in texas' is the wordplay.
'state' becomes 'aver' (both can mean to declare).
'capital in' says to take the initial letters.
The initial letter of 'texas' is 't'.
'aver'+'t'='AVERT'
'from' is the link.
(Other definitions for avert that I've seen before include "Turn away from, say gaze" , "Prevent, ward off" , "Head off" , "Turn away (ones eyes)" , "Forestall" .)