Diamonds, for example, and gold for lover (6)
I believe the answer is:
suitor
'lover' is the definition.
(suitor is a kind of lover)
'diamonds for example and gold' is the wordplay.
'diamonds for example' becomes 'suit' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' says to put letters next to each other.
'gold' becomes 'or' ('or' is the heraldic name for gold).
'suit'+'or'='SUITOR'
'for' is the link.
Can you help me to learn more?
(Other definitions for suitor that I've seen before include "One seeking marriage" , "Wooer" , "Man pursuing a woman for marriage" , "Prospective husband" , "Man who courts a woman" .)