Cove with a bit of beach, apparently (4)
I believe the answer is:
Here is my best explanation:
'cove' is the definition.
'a bit of beach apparently' is the subsidiary indication.
'a bit of' indicates a hidden word.
'chap' is hidden within 'beach apparently'.
'with' is the link.
(Other definitions for chap that I've seen before include "Bloke; (skin) crack", "Crack - fellow", "Man, sore patch", "Raw, cracked patch on skin", "Fellow; sore skin area", "Sore; cheek; man", "Cracked patch (of skin) - gentleman", "Bloke, fellow", "Man, boy, fellow" and "(Of skin) become sore".)