Save money by having the other tap in pink (6)
I believe the answer is:
scrimp
'save' is the definition.
(scrimping is a kind of saving)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for scrimp that I've seen before include "Treat stingily" , "Subsist on a meagre allowance; be thrifty" , "Pinch and save" , "Make too small, stint" , "Use or do less than is needed, be mean" .)