Small songbirds (5)
'small songbirds' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for larks that I've seen before include "Birds; fun" , "Japes" , "Early birds" , "guys" , "[EARLY BIRD]?" .)
'small songbirds' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Another definition for wrens that I've seen is " Small brown birds".)