Help out when bend is too tricky (2,4,3)
I believe the answer is:
do ones bit
'help out' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.
'bend is too tricky' is the wordplay.
'tricky' indicates an anagram.
'bend'+'is'+'too'='bendistoo'
'bendistoo' anagrammed gives 'DO ONES BIT'.
'when' is the link.
Can you help me to learn more?
(Other definitions for do ones bit that I've seen before include "Contribute fairly for the common good" , "Take on a fair share" , "Make a useful contribution" , "muck in" , "Contribute to effort" .)