Definitely grasping and mean (11)

I believe the answer is:

tightfisted

I'm a little stuck... Click here to teach me more about this clue!

'definitely grasping and mean' is the definition.
I can't judge whether this defines the answer.

'grasping and mean' is the wordplay.
'grasping' becomes 'fisted' (I can't justify this - if you can you should believe this answer much more).
'and' says to put letters next to each other.
'mean' becomes 'tight' (both can mean miserly).
'fisted' after 'tight' is 'TIGHTFISTED'.

Can you help me to learn more?

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app