ham-fisted

Toshikazu Kawaguchiの小説 "Before the Coffee Gets Cold Tales from the Cafe" を読んでいます。

Kiyoshi’s face brightened instantly.
‘I see. Thank you very much.’
‘Happy shopping.’
Kyoko was both surprised and impressed. She never would have guessed that a ham-fisted ageing detective like Kiyoshi would be planning a birthday present for his wife. She was fully committed to supporting him in this endeavour.

"ham-fisted" の説明を辞書で見ます。

・Oxford English Dictionary: not having much skill when using your hands or when dealing with people: his ham-fisted efforts to assist her
・Collins Dictionary: If you describe someone as ham-fisted, you mean that they are clumsy, especially in the way that they use their hands.: They can all be made in minutes by even the most ham-fisted of cooks.  
・Cambridge English Dictionary: doing things in an awkward or unskilled way when using the hands or dealing with people: The report criticizes the ham-fisted way in which complaints were dealt with.

言葉の由来がWiktionaryに書かれていました。

From ham (“overacting inferior performer; actor of low grade; incompetent pugilist”) +‎ fisted.