Give the tip directly to the guide at the end of the trip.
Times, Sunday Times
Wonder if they had to give a tip?
The Sun
The drop in trip should help - his wins have come over seven furlongs and a mile - and he can give the tip most to think about.
The Sun
He admitted enjoying her company when they met at competitions and parties and giving her tips on eventing, but remained discreet.
Times, Sunday Times