Rock idol talked oddly (7)
I believe the answer is:
startle
'rock' is the definition.
(I've seen this before)
'idol talked oddly' is the wordplay.
'idol' becomes 'star' (I've seen this before).
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
The alternate letters of 'talked' are 'tle'.
'star'+'tle'='STARTLE'
(Other definitions for startle that I've seen before include "Surprise with fright" , "Take by surprise" , "Scare" , "Cause shock to" , "Surprise with starlet" .)