Drunk guy maybe, pedestrian performer who looks about to drop off? (9,6)
I believe the answer is:
tightrope walker
'performer who looks about to drop off?' is the definition.
(performer who may fall off a rope)
'drunk guy maybe pedestrian' is the wordplay.
'drunk' becomes 'tight' (I've seen this in other clues).
'guy maybe' becomes 'rope' (guy is a type of rope or cable).
'pedestrian' becomes 'walker' (synonyms).
'tight'+'rope'+'walker'='TIGHTROPE WALKER'
(Other definitions for tightrope walker that I've seen before include "Circus performer" , "Funambulist'" , "Charles Blondin, perhaps" , "circus act" , "As one taking highly risky steps" .)