The term 'TRIM BACK, AS A SHRUB' can be solved by the crossword solution 'PRUNE'. Pruning is a horticultural practice that involves cutting back or removing parts of a plant, such as branches, buds, or roots. It is often done to encourage growth, improve the health of the plant, or to shape it into a desired form. Pruning shrubs is a common practice in landscaping and gardening, as it helps to keep them healthy and attractive.