Supply with gold before beginning to laugh and cry (9)
I believe the answer is:
caterwaul
'cry' is the definition.
(I know that caterwaul is a type of cry)
'supply with gold before beginning to laugh' is the wordplay.
'supply' becomes 'cater' (synonyms).
'with' becomes 'w' (abbreviation).
'gold' becomes 'Au' (Au is the chemical symbol for gold).
'before' is a charade indicator (letters next to each other).
'beginning to' indicates taking the first letters.
The first letter of 'laugh' is 'l'.
'cater'+'w'+'au'+'l'='CATERWAUL'
'and' is the link.
(Other definitions for caterwaul that I've seen before include "Sound catty" , "Sound of moggy" , "Make feline howl about curate law" , "Feline cry" , "Howl like a feline" .)