1
general::
Phrase(s): lend a hand (to someone)
Go to lend (someone) a hand., Phrase(s): lend (someone) a hand [and] lend a hand (to someone)
Fig. to give someone some help, not necessarily with the hands. • Could you lend me a hand with this piano? I need to move it across the room. • Could you lend a hand with this math assignment? • I’d be happy to lend a hand.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, lend a helping hand. Be of assistance, as in Can you lend them a hand with putting up the flag, or Peter is always willing to lend a helping hand around the house. [Late 1500s]
American Heritage Idioms