Hotels round Dover maybe making a small contribution (7)

I believe the answer is:

haporth

'a small contribution' is the definition.

'hotels round dover maybe' is the wordplay.
'hotels' becomes 'HH' (two H's - hotel is H in the NATO phonetic alphabet).
'round' is an insertion indicator.
'dover maybe' becomes 'a port'.
'hh' enclosing 'aport' is 'HAPORTH'.

'making' is the link.

(Another definition for haporth that I've seen is " a very small amount".)

I've seen this clue in The Guardian.

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