Help turn the handle as well (4,1,4)
I believe the answer is:
lend a hand
'help' is the definition.
(I've seen this in another clue)
'turn the handle as well' is the wordplay.
'turn' is an anagram indicator.
'as well' becomes 'and' (I've seen this in other clues).
'handle' anagrammed gives 'lendah'.
'lendah'+'and'='LEND A HAND'
(Other definitions for lend a hand that I've seen before include "Give assistance" , "Pitch in" , "temporarily transfer an employee" , "Turn to and help" , "Provide help" .)