The most common and most likely answer to this crossword clue is the 7 letter word RINGING
I've seen this crossword clue in The Times
R
I
N
G
I
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G
More clues leading to the result RINGING
Buddy explains!

The straight part
We know that "Making a call" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case making a call = ringing.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does RINGING mean?
RINGING verb- To enclose or surround.
- To make an incision around; to girdle.
- To attach a ring to, especially for identification.
- To surround or fit with a ring, or as if with a ring.
- To rise in the air spirally.
- To steal and change the identity of (cars) in order to resell them.
- Of a bell, etc., to produce a resonant sound.
- To make (a bell, etc.) produce a resonant sound.
- To produce (a sound) by ringing.
- To produce the sound of a bell or a similar sound.
- Of something spoken or written, to appear to be, to seem, to sound.
- To telephone (someone).
- To resound, reverberate, echo.
- To produce music with bells.
- To repeat often, loudly, or earnestly.
- The sound of something that rings.
- The quality of being resonant.
- A technique used in the study of wild birds, by attaching a small, individually numbered, metal or plastic tag to their legs or wings.
- The theft of cars and illegally changing their identities for resale.
- Loud and clear.
- Made forcefully; powerful.