Clue: Man admits love with mum – one's predictions are distinctly 'earthy' (7)
Answer: GEOMANT
Explanation: Definition: one's predictions are distinctly 'earthy'
**GENT** ("man") *admits* **O** ("love", in tennis) *with* **MA** ("mum") 
 
 
*A geomant is someone who divines using shapes formed randomly, for example when earth is thrown on to a piece of flat ground or paper.