Place to keep a vessel — space on the counter, one that’s no good (7)
I believe the answer is:
mooring
'place to keep a vessel' is the definition.
I can't judge whether this defines the answer.
'space on the counter one that's no good' is the wordplay.
'space' becomes 'room' (room is a kind of space).
'on the counter' is a reversal indicator (counter can mean in the opposite direction).
'one' becomes 'i' (roman numeral).
'that's no' becomes 'n' (common abbreviation).
'good' becomes 'g' (abbreviation).
'room' written backwards gives 'moor'.
'moor'+'i'+'n'+'g'='MOORING'
Can you help me to learn more?
(Other definitions for mooring that I've seen before include "Place to tie up a vessel" , "Place to keep a boat" , "ensuring boat is safe" , "Making fast" , "Place for anchoring or tying up" .)