Stain and stick together shed in Beer busy SW seaside spot (14)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

TINT (stain) + insertion of GEL (stick together) + CAST (shed) in ALE . Beer is capitalised as it’s the name of another place on the southwest coast of England, though not as full of visitors as Tintagel, which has become a bit of a King Arthur theme park