1. apply a final touch to fix something or finish successfully
will/should/help do the trick
If something will 'do the trick' it will serve as a good substitute until a better solution is found. If something breaks, for example, and you manage to fix it temporarily before bringing it to be repaired you could say 'That did the trick!'. If something 'does the trick' also means it did what was required. "The soup was a little bland, but I added some paprika and it really did the trick!" This is a common idiomatic expression in social and professional contexts.