EXPLANATIONS FOR CLUES
1A: hidden word (soHO MERriment)
4A: odd number letters (MeAn RoGuE)
5A: cryptic definition (great DANES)
1D: First letters of Hairdresser Uniform (HU) with dull (dim) backwards (mid) (HU+MID= wet and hot)
2D: Leader of Russian (R) in MOON (MO+R+ON)
3D: Forest animals (DEER) going back (REED) at start of spring (S) (REEDS)