Conducted over good lab frequently (5,3)
I believe the answer is:
guide dog
'lab frequently' is the definition.
I can't tell whether this definition defines the answer.
'conducted over good' is the wordplay.
'conducted' becomes 'guided' (synonyms).
'over' becomes 'o' (cricket abbreviation).
'good' becomes 'g' (abbreviation).
'guided'+'o'+'g'='GUIDE-DOG'
Can you help me to learn more?
(Other definitions for guide dog that I've seen before include "Canine for the visually-impaired" , "Aid for the visually impaired" , "Only animal allowed in?" , "Aid for blind person" , "Seeing eye" .)