Slightly and briefly,to get out of climb notch, (which takes you beyond ATHR range), thus trend very briefly to MCT thrust, then throttle back (a very short while after) to initial climb position, when a proper IAS is recovered. (Is what I was taught under line training)
Yeh I do that all the time and it works too! Saves a lot of bloodey knob-pulling. Found the newer IAEs are more suseptable to this decay of speed than the older CFMs I used to fly. Dunno why.