Play, as a guitar
I believe the answer is:
strum
'play as a guitar' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for strum that I've seen before include "Play a stringed instrument (badly)" , "'Sound the strings, musically (5)'" , "Pluck the strings idly" , "Play a banjo" , "Sweepingly sound guitar strings" .)